Changeset 503 for pjproject

Timestamp:

Jun 13, 2006 10:57:13 PM (18 years ago)

Author:

bennylp

Message:

-- REWRITE OF PJSUA API --

Location:

pjproject/trunk

Files:

• pjlib/src/pj/config.c (modified) (1 diff)
• pjsip-apps/build (modified) (1 prop)
• pjsip-apps/build/activex-pjsua.dsp (modified) (1 diff)
• pjsip-apps/build/pjsua.dsp (modified) (1 diff)
• pjsip-apps/src/activex-pjsua (modified) (1 prop)
• pjsip-apps/src/pjsua/main.c (modified) (1 diff)
• pjsip-apps/src/pjsua/pjsua.c (added)
• pjsip/build/pjsua_lib.dsp (modified) (3 diffs)
• pjsip/include/pjsua-lib/pjsua.h (modified) (19 diffs)
• pjsip/include/pjsua-lib/pjsua_console_app.h (deleted)
• pjsip/include/pjsua-lib/pjsua_internal.h (added)
• pjsip/src/pjsua-lib/pjsua_acc.c (added)
• pjsip/src/pjsua-lib/pjsua_call.c (modified) (33 diffs)
• pjsip/src/pjsua-lib/pjsua_console_app.c (deleted)
• pjsip/src/pjsua-lib/pjsua_core.c (modified) (9 diffs)
• pjsip/src/pjsua-lib/pjsua_im.c (modified) (13 diffs)
• pjsip/src/pjsua-lib/pjsua_imp.h (deleted)
• pjsip/src/pjsua-lib/pjsua_media.c (added)
• pjsip/src/pjsua-lib/pjsua_pres.c (modified) (27 diffs)
• pjsip/src/pjsua-lib/pjsua_reg.c (deleted)
• pjsip/src/pjsua-lib/pjsua_settings.c (deleted)

pjproject/trunk/pjlib/src/pj/config.c

@@ -22 +22 @@
 
 static const char *id = "config.c";
-const char *PJ_VERSION = "0.5.5.6";
+const char *PJ_VERSION = "0.5.6.0";
 
 PJ_DEF(void) pj_dump_config(void)

pjproject/trunk/pjsip-apps/build

@@ -8 +8 @@
 *.suo
 *.pdb
+activex-pjsua_p.c
+dlldata.c

@@ -8 +8 @@
 *.suo
 *.pdb
+activex-pjsua_p.c
+dlldata.c

pjproject/trunk/pjsip-apps/build/activex-pjsua.dsp

@@ -324 +324 @@
 # Begin Source File
 
-SOURCE="..\src\activex-pjsua\pjsua.h"
+SOURCE="..\src\activex-pjsua\pjsua-structs.h"
 # End Source File
 # Begin Source File

pjproject/trunk/pjsip-apps/build/pjsua.dsp

@@ -93 +93 @@
 SOURCE=..\src\pjsua\main.c
 # End Source File
+# Begin Source File
+
+SOURCE=..\src\pjsua\pjsua.c
+# End Source File
 # End Group
 # Begin Group "Header Files"

pjproject/trunk/pjsip-apps/src/pjsua/main.c

@@ -18 +18 @@
  */
 #include <pjsua-lib/pjsua.h>
-#include <pjsua-lib/pjsua_console_app.h>
-
 
 #define THIS_FILE       "main.c"
 
-/*****************************************************************************
- * main():
+
+/*
+ * These are defined in pjsua.c.
  */
+pj_status_t app_init(int argc, char *argv[]);
+pj_status_t app_main(void);
+pj_status_t app_destroy(void);
+
 int main(int argc, char *argv[])
 {
-    pjsua_config cfg;
-    pj_str_t uri_to_call = { NULL, 0 };
-
-    /* Init default settings. */
-    pjsua_default_config(&cfg);
-
-
-    /* Create PJLIB and memory pool */
-    pjsua_create();
-
-
-    /* Parse command line arguments: */
-    if (pjsua_parse_args(argc, argv, &cfg, &uri_to_call) != PJ_SUCCESS)
+    if (app_init(argc, argv) != PJ_SUCCESS)
         return 1;
 
-
-    /* Init pjsua */
-    if (pjsua_init(&cfg, &console_callback) != PJ_SUCCESS)
-        return 1;
-
-
-    /* Start pjsua! */
-    if (pjsua_start() != PJ_SUCCESS) {
-        pjsua_destroy();
-        return 1;
-    }
-
-
-    /* Sleep for a while, let any messages get printed to console: */
-    pj_thread_sleep(500);
-
-
-    /* Start UI console main loop: */
-    pjsua_console_app_main(&uri_to_call);
-
-
-    /* Destroy pjsua: */
-    pjsua_destroy();
-
-    /* This is for internal testing, to make sure that pjsua_destroy()
-     * can be called multiple times. 
-     */
-    pjsua_destroy();
-
-
-    /* Exit... */
+    app_main();
+    app_destroy();
 
     return 0;

pjproject/trunk/pjsip/build/pjsua_lib.dsp

@@ -88 +88 @@
 # Begin Source File
 
-SOURCE="..\src\pjsua-lib\pjsua_call.c"
+SOURCE="..\src\pjsua-lib\pjsua_acc.c"
 # End Source File
 # Begin Source File
 
-SOURCE="..\src\pjsua-lib\pjsua_console_app.c"
+SOURCE="..\src\pjsua-lib\pjsua_call.c"
 # End Source File
 # Begin Source File
@@ -104 +104 @@
 # Begin Source File
 
-SOURCE="..\src\pjsua-lib\pjsua_imp.h"
+SOURCE="..\src\pjsua-lib\pjsua_media.c"
 # End Source File
 # Begin Source File
 
 SOURCE="..\src\pjsua-lib\pjsua_pres.c"
-# End Source File
-# Begin Source File
-
-SOURCE="..\src\pjsua-lib\pjsua_reg.c"
-# End Source File
-# Begin Source File
-
-SOURCE="..\src\pjsua-lib\pjsua_settings.c"
 # End Source File
 # End Group
@@ -128 +120 @@
 # Begin Source File
 
-SOURCE="..\include\pjsua-lib\pjsua_console_app.h"
+SOURCE="..\include\pjsua-lib\pjsua_internal.h"
 # End Source File
 # End Group

pjproject/trunk/pjsip/include/pjsua-lib/pjsua.h

@@ -57 +57 @@
  */
 #ifndef PJSUA_MAX_CALLS
-#   define PJSUA_MAX_CALLS          256
+#   define PJSUA_MAX_CALLS          32
 #endif
 
 
 /**
+ * Max ports in the conference bridge.
+ */
+#ifndef PJSUA_MAX_CONF_PORTS
+#   define PJSUA_MAX_CONF_PORTS     254
+#endif
+
+
+/**
  * Maximum accounts.
  */
 #ifndef PJSUA_MAX_ACC
-#   define PJSUA_MAX_ACC            32
+#   define PJSUA_MAX_ACC            8
 #endif
 
 
+/**
+ * Maximum proxies in account.
+ */
+#ifndef PJSUA_ACC_MAX_PROXIES
+#   define PJSUA_ACC_MAX_PROXIES    8
+#endif
+
+/**
+ * Default registration interval.
+ */
+#ifndef PJSUA_REG_INTERVAL
+#   define PJSUA_REG_INTERVAL       55
+#endif
+
+
+/** Account identification */
 typedef int pjsua_acc_id;
+
+/** Call identification */
+typedef int pjsua_call_id;
+
+/** SIP transport identification */
+typedef int pjsua_transport_id;
+
+/** Buddy identification */
 typedef int pjsua_buddy_id;
+
+/** File player identification */
 typedef int pjsua_player_id;
+
+/** File recorder identification */
 typedef int pjsua_recorder_id;
+
+/** Conference port identification */
 typedef int pjsua_conf_port_id;
 
 
+/** Constant to identify invalid ID for all sorts of IDs. */
+#define PJSUA_INVALID_ID            (-1)
+
+
+
 /**
  * Account configuration.
  */
-struct pjsua_acc_config
-{
-    /** SIP URL for account ID (mandatory) */
+typedef struct pjsua_acc_config
+{
+    /** 
+     * The full SIP URL for the account. The value can take name address or 
+     * URL format, and will look something like "sip:account@serviceprovider".
+     *
+     * This field is mandatory.
+     */
     pj_str_t        id;
 
-    /** Registrar URI (mandatory) */
+    /** 
+     * This is the URL to be put in the request URI for the registration,
+     * and will look something like "sip:serviceprovider".
+     *
+     * This field should be specified if registration is desired. If the
+     * value is empty, no account registration will be performed.
+     */
     pj_str_t        reg_uri;
 
-    /** Optional contact URI */
+    /** 
+     * Optional URI to be put as Contact for this account. It is recommended
+     * that this field is left empty, so that the value will be calculated
+     * automatically based on the transport address.
+     */
     pj_str_t        contact;
 
-    /** Service proxy (default: none) */
-    pj_str_t        proxy;
-
-    /** Default timeout (mandatory) */
-    pj_int32_t      reg_timeout;
-
-    /** Number of credentials. */
+    /**
+     * Number of proxies in the proxy array below.
+     */
+    unsigned        proxy_cnt;
+
+    /** 
+     * Optional URI of the proxies to be visited for all outgoing requests 
+     * that are using this account (REGISTER, INVITE, etc). Application need 
+     * to specify these proxies if the service provider requires that requests
+     * destined towards its network should go through certain proxies first
+     * (for example, border controllers).
+     *
+     * These proxies will be put in the route set for this account, with 
+     * maintaining the orders (the first proxy in the array will be visited
+     * first).
+     */
+    pj_str_t        proxy[PJSUA_ACC_MAX_PROXIES];
+
+    /** 
+     * Optional interval for registration, in seconds. If the value is zero, 
+     * default interval will be used (PJSUA_REG_INTERVAL, 55 seconds).
+     */
+    unsigned        reg_timeout;
+
+    /** 
+     * Number of credentials in the credential array.
+     */
     unsigned        cred_count;
 
-    /** Array of credentials. */
-    pjsip_cred_info cred_info[4];
-
-};
-
-
-/**
- * @see pjsua_acc_config
- */
-typedef struct pjsua_acc_config pjsua_acc_config;
-
-
-/**
- * PJSUA settings.
- */
-struct pjsua_config
-{
-    /** SIP UDP signaling port. Set to zero to disable UDP signaling,
-     * which in this case application must manually add a transport
-     * to SIP endpoint.
-     * (default: 5060) 
-     */
-    unsigned    udp_port;
-
-    /** Optional hostname or IP address to publish as the host part of
-     *  Contact header. This must be specified if UDP transport is
-     *  disabled.
-     *  (default: NULL)
-     */
-    pj_str_t    sip_host;
-
-    /** Optional port number to publish in the port part of Contact header.
-     *  This must be specified if UDP transport is disabled.
-     *  (default: 0)
-     */
-    unsigned    sip_port;
-
-    /** Start of RTP port. Set to zero to prevent pjsua from creating
-     *  media transports, which in this case application must manually
-     *  create media transport for each calls.
-     *  (default: 4000) 
-     */
-    unsigned    start_rtp_port;
-
-    /**
-     * Enable incoming and outgoing message logging (default: 1).
+    /** 
+     * Array of credentials. If registration is desired, normally there should
+     * be at least one credential specified, to successfully authenticate
+     * against the service provider. More credentials can be specified, for
+     * example when the requests are expected to be challenged by the
+     * proxies in the route set.
+     */
+    pjsip_cred_info cred_info[PJSUA_ACC_MAX_PROXIES];
+
+} pjsua_acc_config;
+
+
+/**
+ * Call this function to initialize account config with default values.
+ *
+ * @param cfg       The account config to be initialized.
+ */
+PJ_INLINE(void) pjsua_acc_config_default(pjsua_acc_config *cfg)
+{
+    pj_memset(cfg, 0, sizeof(*cfg));
+
+    cfg->reg_timeout = PJSUA_REG_INTERVAL;
+}
+
+
+
+/**
+ * Account info. Application can query account info by calling 
+ * #pjsua_acc_get_info().
+ */
+typedef struct pjsua_acc_info
+{
+    /** 
+     * The account ID. 
+     */
+    pjsua_acc_id        id;
+
+    /**
+     * Flag to indicate whether this is the default account.
+     */
+    pj_bool_t           is_default;
+
+    /** 
+     * Account URI 
+     */
+    pj_str_t            acc_uri;
+
+    /** 
+     * Flag to tell whether this account has registration setting
+     * (reg_uri is not empty).
+     */
+    pj_bool_t           has_registration;
+
+    /**
+     * An up to date expiration interval for account registration session.
+     */
+    int                 expires;
+
+    /**
+     * Last registration status code. If status code is zero, the account
+     * is currently not registered. Any other value indicates the SIP
+     * status code of the registration.
+     */
+    pjsip_status_code   status;
+
+    /**
+     * String describing the registration status.
+     */
+    pj_str_t            status_text;
+
+    /**
+     * Presence online status for this account.
+     */
+    pj_bool_t           online_status;
+
+    /**
+     * Buffer that is used internally to store the status text.
+     */
+    char                buf_[PJ_ERR_MSG_SIZE];
+
+} pjsua_acc_info;
+
+
+
+/**
+ * STUN configuration.
+ */
+typedef struct pjsua_stun_config
+{
+    /**
+     * The first STUN server IP address or hostname.
+     */
+    pj_str_t    stun_srv1;
+
+    /**
+     * Port number of the first STUN server.
+     * If zero, default STUN port will be used.
+     */
+    unsigned    stun_port1;
+    
+    /**
+     * Optional second STUN server IP address or hostname, for which the
+     * result of the mapping request will be compared to. If the value
+     * is empty, only one STUN server will be used.
+     */
+    pj_str_t    stun_srv2;
+
+    /**
+     * Port number of the second STUN server.
+     * If zero, default STUN port will be used.
+     */
+    unsigned    stun_port2;
+
+} pjsua_stun_config;
+
+
+
+/**
+ * Call this function to initialize STUN config with default values.
+ *
+ * @param cfg       The STUN config to be initialized.
+ */
+PJ_INLINE(void) pjsua_stun_config_default(pjsua_stun_config *cfg)
+{
+    pj_memset(cfg, 0, sizeof(*cfg));
+}
+
+
+/**
+ * Transport configuration for creating UDP transports for both SIP
+ * and media.
+ */
+typedef struct pjsua_transport_config
+{
+    /**
+     * UDP port number to bind locally. This setting MUST be specified
+     * even when default port is desired. If the value is zero, the
+     * transport will be bound to any available port, and application
+     * can query the port by querying the transport info.
+     */
+    unsigned            port;
+
+    /**
+     * Optional address where the socket should be bound.
+     */
+    pj_in_addr          ip_addr;
+
+    /**
+     * Flag to indicate whether STUN should be used.
+     */
+    pj_bool_t           use_stun;
+
+    /**
+     * STUN configuration, must be specified when STUN is used.
+     */
+    pjsua_stun_config   stun_config;
+
+} pjsua_transport_config;
+
+
+/**
+ * Call this function to initialize UDP config with default values.
+ *
+ * @param cfg       The UDP config to be initialized.
+ */
+PJ_INLINE(void) pjsua_transport_config_default(pjsua_transport_config *cfg)
+{
+    pj_memset(cfg, 0, sizeof(*cfg));
+}
+
+
+/**
+ * Normalize STUN config.
+ */
+PJ_INLINE(void) pjsua_normalize_stun_config( pjsua_stun_config *cfg )
+{
+    if (cfg->stun_srv1.slen) {
+
+        if (cfg->stun_port1 == 0)
+            cfg->stun_port1 = 3478;
+
+        if (cfg->stun_srv2.slen == 0) {
+            cfg->stun_srv2 = cfg->stun_srv1;
+            cfg->stun_port2 = cfg->stun_port1;
+        } else {
+            if (cfg->stun_port2 == 0)
+                cfg->stun_port2 = 3478;
+        }
+
+    } else {
+        cfg->stun_port1 = 0;
+        cfg->stun_srv2.slen = 0;
+        cfg->stun_port2 = 0;
+    }
+}
+
+
+/**
+ * Duplicate transport config.
+ */
+PJ_INLINE(void) pjsua_transport_config_dup(pj_pool_t *pool,
+                                           pjsua_transport_config *dst,
+                                           const pjsua_transport_config *src)
+{
+    pj_memcpy(dst, src, sizeof(*src));
+
+    if (src->stun_config.stun_srv1.slen) {
+        pj_strdup_with_null(pool, &dst->stun_config.stun_srv1,
+                            &src->stun_config.stun_srv1);
+    }
+
+    if (src->stun_config.stun_srv2.slen) {
+        pj_strdup_with_null(pool, &dst->stun_config.stun_srv2,
+                            &src->stun_config.stun_srv2);
+    }
+
+    pjsua_normalize_stun_config(&dst->stun_config);
+}
+
+
+
+/**
+ * Transport info.
+ */
+typedef struct pjsua_transport_info
+{
+    /**
+     * PJSUA transport identification.
+     */
+    pjsua_transport_id      id;
+
+    /**
+     * Transport type.
+     */
+    pjsip_transport_type_e  type;
+
+    /**
+     * Transport type name.
+     */
+    pj_str_t                type_name;
+
+    /**
+     * Transport string info/description.
+     */
+    pj_str_t                info;
+
+    /**
+     * Transport flag (see ##pjsip_transport_flags_e).
+     */
+    unsigned                flag;
+
+    /**
+     * Local address length.
+     */
+    unsigned                addr_len;
+
+    /**
+     * Local/bound address.
+     */
+    pj_sockaddr             local_addr;
+
+    /**
+     * Published address (or transport address name).
+     */
+    pjsip_host_port         local_name;
+
+    /**
+     * Current number of objects currently referencing this transport.
+     */
+    unsigned                usage_count;
+
+
+} pjsua_transport_info;
+
+
+/**
+ * Media configuration.
+ */
+typedef struct pjsua_media_config
+{
+    /**
+     * Clock rate to be applied to the conference bridge.
+     * If value is zero, default clock rate will be used (16KHz).
+     */
+    unsigned            clock_rate;
+
+    /**
+     * Specify maximum number of media ports to be created in the
+     * conference bridge. Since all media terminate in the bridge
+     * (calls, file player, file recorder, etc), the value must be
+     * large enough to support all of them. However, the larger
+     * the value, the more computations are performed.
+     */
+    unsigned            max_media_ports;
+
+    /**
+     * Specify whether the media manager should manage its own
+     * ioqueue for the RTP/RTCP sockets. If yes, ioqueue will be created
+     * and at least one worker thread will be created too. If no,
+     * the RTP/RTCP sockets will share the same ioqueue as SIP sockets,
+     * and no worker thread is needed.
+     *
+     * Normally application would say yes here, unless it wants to
+     * run everything from a single thread.
+     */
+    pj_bool_t           has_ioqueue;
+
+    /**
+     * Specify the number of worker threads to handle incoming RTP
+     * packets. A value of one is recommended for most applications.
+     */
+    unsigned            thread_cnt;
+
+
+} pjsua_media_config;
+
+
+/**
+ * Use this function to initialize media config.
+ *
+ * @param cfg   The media config to be initialized.
+ */
+PJ_INLINE(void) pjsua_media_config_default(pjsua_media_config *cfg)
+{
+    pj_memset(cfg, 0, sizeof(*cfg));
+
+    cfg->clock_rate = 16000;
+    cfg->max_media_ports = 32;
+    cfg->has_ioqueue = PJ_TRUE;
+    cfg->thread_cnt = 1;
+}
+
+
+
+/**
+ * Logging configuration.
+ */
+typedef struct pjsua_logging_config
+{
+    /**
+     * Log incoming and outgoing SIP message? Yes!
      */
     pj_bool_t   msg_logging;
 
-    /** Maximum calls to support (default: 4) */
-    unsigned    max_calls;
-
-    /** Maximum slots in the conference bridge (default: 0/calculated
-     *  as max_calls*2
-     */
-    unsigned    conf_ports;
-
-    /** Number of worker threads (value >=0, default: 1) */
-    unsigned    thread_cnt;
-
-    /** Separate ioqueue for media? (default: yes) */
-    pj_bool_t   media_has_ioqueue;
-
-    /** Number of worker thread for media (value >=0, default: 1) */
-    unsigned    media_thread_cnt;
-
-    /** First STUN server IP address. When STUN is configured, then the
-     *  two STUN server settings must be fully set.
-     *  (default: none) 
-     */
-    pj_str_t    stun_srv1;
-
-    /** First STUN port number */
-    unsigned    stun_port1;
-
-    /** Second STUN server IP address */
-    pj_str_t    stun_srv2;
-
-    /** Second STUN server port number */
-    unsigned    stun_port2;
-
-    /** Sound player device ID (default: 0) */
-    unsigned    snd_player_id;
-
-    /** Sound capture device ID (default: 0) */
-    unsigned    snd_capture_id;
-
-    /** Internal clock rate (to be applied to sound devices and conference
-     *  bridge, default is 0/follows the codec, or 44100 for MacOS).
-     */
-    unsigned    clock_rate;
-
-    /** Do not use sound device (default: 0). */
-    pj_bool_t   null_audio;
-
-    /** WAV file to load for auto_play (default: NULL) */
-    pj_str_t    wav_file;
-
-    /** Auto play WAV file for calls? (default: no) */
-    pj_bool_t   auto_play;
-
-    /** Auto loopback calls? (default: no) */
-    pj_bool_t   auto_loop;
-
-    /** Automatically put calls to conference? (default: no) */
-    pj_bool_t   auto_conf;
-
-    /** Speex codec complexity? (default: 10) */
-    unsigned    complexity;
-
-    /** Speex codec quality? (default: 10) */
-    unsigned    quality;
-
-    /** Codec ptime? (default: 0 (follows the codec)) */
-    unsigned    ptime;
-
-    /** Number of additional codecs/"--add-codec" with pjsua (default: 0) */
-    unsigned    codec_cnt;
-
-    /** Additional codecs/"--add-codec" options */
-    pj_str_t    codec_arg[32];
-
-    /** SIP status code to be automatically sent to incoming calls
-     *  (default: 100).
-     */
-    unsigned    auto_answer;
-
-    /** Periodic time to refresh call with re-INVITE (default: 0)
-     */
-    unsigned    uas_refresh;
-
-    /** Maximum incoming call duration (default: 3600) */
-    unsigned    uas_duration;
-
-    /** Outbound proxy (default: none) */
-    pj_str_t    outbound_proxy;
-
-    /** Number of SIP accounts */
-    unsigned    acc_cnt;
-
-    /** SIP accounts configuration */
-    pjsua_acc_config    acc_config[32];
-
-    /** Logging verbosity (default: 5). */
-    unsigned    log_level;
-
-    /** Logging to be displayed to stdout (default: 4) */
-    unsigned    app_log_level;
-
-    /** Log decoration */
-    unsigned    log_decor;
-
-    /** Optional log filename (default: NULL) */
+    /**
+     * Input verbosity level. Value 5 is reasonable.
+     */
+    unsigned    level;
+
+    /**
+     * Verbosity level for console. Value 4 is reasonable.
+     */
+    unsigned    console_level;
+
+    /**
+     * Log decoration.
+     */
+    unsigned    decor;
+
+    /**
+     * Optional log filename.
+     */
     pj_str_t    log_filename;
 
-    /** Number of buddies in address book (default: 0) */
-    unsigned    buddy_cnt;
-
-    /** Buddies URI */
-    pj_str_t    buddy_uri[256];
-};
-
-
-/**
- * @see pjsua_config
- */
-typedef struct pjsua_config pjsua_config;
-
+    /**
+     * Optional callback function to be called to write log to 
+     * application specific device. This function will be called for
+     * log messages on input verbosity level.
+     */
+    void       (*cb)(int level, const char *data, pj_size_t len);
+
+
+} pjsua_logging_config;
+
+
+/**
+ * Use this function to initialize logging config.
+ *
+ * @param cfg   The logging config to be initialized.
+ */
+PJ_INLINE(void) pjsua_logging_config_default(pjsua_logging_config *cfg)
+{
+    pj_memset(cfg, 0, sizeof(*cfg));
+
+    cfg->msg_logging = PJ_TRUE;
+    cfg->level = 5;
+    cfg->console_level = 4;
+    cfg->decor = PJ_LOG_HAS_SENDER | PJ_LOG_HAS_TIME | 
+                 PJ_LOG_HAS_MICRO_SEC | PJ_LOG_HAS_NEWLINE;
+}
+
+/**
+ * Use this function to duplicate logging config.
+ *
+ * @param pool      Pool to use.
+ * @param dst       Destination config.
+ * @param src       Source config.
+ */
+PJ_INLINE(void) pjsua_logging_config_dup(pj_pool_t *pool,
+                                         pjsua_logging_config *dst,
+                                         const pjsua_logging_config *src)
+{
+    pj_memcpy(dst, src, sizeof(*src));
+    pj_strdup_with_null(pool, &dst->log_filename, &src->log_filename);
+}
+
+
+/**
+ * Buddy configuration.
+ */
+typedef struct pjsua_buddy_config
+{
+    /**
+     * Buddy URL or name address.
+     */
+    pj_str_t    uri;
+
+    /**
+     * Specify whether presence subscription should start immediately.
+     */
+    pj_bool_t   subscribe;
+
+} pjsua_buddy_config;
+
+
+/**
+ * Buddy's online status.
+ */
+typedef enum pjsua_buddy_status
+{
+    /**
+     * Online status is unknown (possibly because no presence subscription
+     * has been established).
+     */
+    PJSUA_BUDDY_STATUS_UNKNOWN,
+
+    /**
+     * Buddy is known to be offline.
+     */
+    PJSUA_BUDDY_STATUS_ONLINE,
+
+    /**
+     * Buddy is offline.
+     */
+    PJSUA_BUDDY_STATUS_OFFLINE,
+
+} pjsua_buddy_status;
+
+
+
+/**
+ * Buddy info.
+ */
+typedef struct pjsua_buddy_info
+{
+    /**
+     * The buddy ID.
+     */
+    pjsua_buddy_id      id;
+
+    /**
+     * The full URI of the buddy, as specified in the configuration.
+     */
+    pj_str_t            uri;
+
+    /**
+     * Buddy's Contact, only available when presence subscription has
+     * been established to the buddy.
+     */
+    pj_str_t            contact;
+
+    /**
+     * Buddy's online status.
+     */
+    pjsua_buddy_status  status;
+
+    /**
+     * Text to describe buddy's online status.
+     */
+    pj_str_t            status_text;
+
+    /**
+     * Flag to indicate that we should monitor the presence information for
+     * this buddy (normally yes, unless explicitly disabled).
+     */
+    pj_bool_t           monitor_pres;
+
+    /**
+     * Internal buffer.
+     */
+    char                buf_[256];
+
+} pjsua_buddy_info;
+
+
+/**
+ * Codec config.
+ */
+typedef struct pjsua_codec_info
+{
+    /**
+     * Codec unique identification.
+     */
+    pj_str_t            codec_id;
+
+    /**
+     * Codec priority (integer 0-255).
+     */
+    pj_uint8_t          priority;
+
+    /**
+     * Internal buffer.
+     */
+    char                buf_[32];
+
+} pjsua_codec_info;
 
 
@@ -272 +698 @@
  * Application callbacks.
  */
-struct pjsua_callback
+typedef struct pjsua_callback
 {
     /**
@@ -279 +705 @@
      * detail call states.
      */
-    void (*on_call_state)(int call_index, pjsip_event *e);
+    void (*on_call_state)(pjsua_call_id call_id, pjsip_event *e);
 
     /**
      * Notify application on incoming call.
      */
-    void (*on_incoming_call)(pjsua_acc_id acc_id, int call_index,
+    void (*on_incoming_call)(pjsua_acc_id acc_id, pjsua_call_id call_id,
                              pjsip_rx_data *rdata);
+
+    /**
+     * Notify application when media state in the call has changed.
+     * Normal application would need to implement this callback, e.g.
+     * to connect the call's media to sound device.
+     */
+    void (*on_call_media_state)(pjsua_call_id call_id);
 
     /**
@@ -294 +727 @@
      * transfer.
      */
-    void (*on_call_transfered)(int call_index,
+    void (*on_call_transfered)(pjsua_call_id call_id,
                                const pj_str_t *dst,
                                pjsip_status_code *code);
@@ -313 +746 @@
     /**
      * Notify application on incoming pager (i.e. MESSAGE request).
-     * Argument call_index will be -1 if MESSAGE request is not related to an 
+     * Argument call_id will be -1 if MESSAGE request is not related to an
      * existing call.
      */
-    void (*on_pager)(int call_index, const pj_str_t *from,
-                     const pj_str_t *to, const pj_str_t *txt);
+    void (*on_pager)(pjsua_call_id call_id, const pj_str_t *from,
+                     const pj_str_t *to, const pj_str_t *contact,
+                     const pj_str_t *mime_type, const pj_str_t *body);
+
+    /**
+     * Notify application about the delivery status of outgoing pager
+     * request.
+     *
+     * @param call_id       Containts the ID of the call where the IM was
+     *                      sent, or PJSUA_INVALID_ID if the IM was sent
+     *                      outside call context.
+     * @param to            Destination URI.
+     * @param body          Message body.
+     * @param user_data     Arbitrary data that was specified when sending
+     *                      IM message.
+     * @param status        Delivery status.
+     * @param reason        Delivery status reason.
+     */
+    void (*on_pager_status)(pjsua_call_id call_id,
+                            const pj_str_t *to,
+                            const pj_str_t *body,
+                            void *user_data,
+                            pjsip_status_code status,
+                            const pj_str_t *reason);
 
     /**
      * Notify application about typing indication.
      */
-    void (*on_typing)(int call_index, const pj_str_t *from,
-                      const pj_str_t *to, pj_bool_t is_typing);
-
-};
-
-/**
- * @see pjsua_callback
- */
-typedef struct pjsua_callback pjsua_callback;
+    void (*on_typing)(pjsua_call_id call_id, const pj_str_t *from,
+                      const pj_str_t *to, const pj_str_t *contact,
+                      pj_bool_t is_typing);
+
+} pjsua_callback;
+
+
+
+
+/**
+ * PJSUA settings.
+ */
+typedef struct pjsua_config
+{
+
+    /** 
+     * Maximum calls to support (default: 4) 
+     */
+    unsigned        max_calls;
+
+    /** 
+     * Number of worker threads. Normally application will want to have at
+     * least one worker thread, unless when it wants to poll the library
+     * periodically, which in this case the worker thread can be set to
+     * zero.
+     */
+    unsigned        thread_cnt;
+
+    /**
+     * Number of outbound proxies in the array.
+     */
+    unsigned        outbound_proxy_cnt;
+
+    /** 
+     * Specify the URL of outbound proxies to visit for all outgoing requests.
+     * The outbound proxies will be used for all accounts, and it will
+     * be used to build the route set for outgoing requests. The final
+     * route set for outgoing requests will consists of the outbound proxies
+     * and the proxy configured in the account.
+     */
+    pj_str_t        outbound_proxy[4];
+
+    /** 
+     * Number of credentials in the credential array.
+     */
+    unsigned        cred_count;
+
+    /** 
+     * Array of credentials. These credentials will be used by all accounts,
+     * and can be used to authenticate against outbound proxies.
+     */
+    pjsip_cred_info cred_info[PJSUA_ACC_MAX_PROXIES];
+
+    /**
+     * Application callback.
+     */
+    pjsua_callback  cb;
+
+} pjsua_config;
+
+
+/**
+ * Use this function to initialize pjsua config.
+ *
+ * @param cfg   pjsua config to be initialized.
+ */
+PJ_INLINE(void) pjsua_config_default(pjsua_config *cfg)
+{
+    pj_memset(cfg, 0, sizeof(*cfg));
+
+    cfg->max_calls = 4;
+    cfg->thread_cnt = 1;
+}
+
+
+/**
+ * Duplicate credential.
+ */
+PJ_INLINE(void) pjsip_cred_dup( pj_pool_t *pool,
+                                pjsip_cred_info *dst,
+                                const pjsip_cred_info *src)
+{
+    pj_strdup_with_null(pool, &dst->realm, &src->realm);
+    pj_strdup_with_null(pool, &dst->scheme, &src->scheme);
+    pj_strdup_with_null(pool, &dst->username, &src->username);
+    pj_strdup_with_null(pool, &dst->data, &src->data);
+
+}
+
+
+/**
+ * Duplicate pjsua_config.
+ */
+PJ_INLINE(void) pjsua_config_dup(pj_pool_t *pool,
+                                 pjsua_config *dst,
+                                 const pjsua_config *src)
+{
+    unsigned i;
+
+    pj_memcpy(dst, src, sizeof(*src));
+
+    for (i=0; i<src->outbound_proxy_cnt; ++i) {
+        pj_strdup_with_null(pool, &dst->outbound_proxy[i],
+                            &src->outbound_proxy[i]);
+    }
+
+    for (i=0; i<src->cred_count; ++i) {
+        pjsip_cred_dup(pool, &dst->cred_info[i], &src->cred_info[i]);
+    }
+}
+
+
+/**
+ * Call media status.
+ */
+typedef enum pjsua_call_media_status
+{
+    PJSUA_CALL_MEDIA_NONE,
+    PJSUA_CALL_MEDIA_ACTIVE,
+    PJSUA_CALL_MEDIA_LOCAL_HOLD,
+    PJSUA_CALL_MEDIA_REMOTE_HOLD,
+} pjsua_call_media_status;
 
 
@@ -336 +904 @@
  * Call info.
  */
-struct pjsua_call_info
-{
-    unsigned            index;
-    pj_bool_t           active;
+typedef struct pjsua_call_info
+{
+    /** Call identification. */
+    pjsua_call_id       id;
+
+    /** Initial call role (UAC == caller) */
     pjsip_role_e        role;
+
+    /** Local URI */
     pj_str_t            local_info;
+
+    /** Local Contact */
+    pj_str_t            local_contact;
+
+    /** Remote URI */
     pj_str_t            remote_info;
+
+    /** Remote contact */
+    pj_str_t            remote_contact;
+
+    /** Dialog Call-ID string. */
+    pj_str_t            call_id;
+
+    /** Call state */
     pjsip_inv_state     state;
+
+    /** Text describing the state */
     pj_str_t            state_text;
+
+    /** Last status code heard, which can be used as cause code */
     pjsip_status_code   last_status;
+
+    /** The reason phrase describing the status. */
     pj_str_t            last_status_text;
+
+    /** Call media status. */
+    pjsua_call_media_status media_status;
+
+    /** Media direction */
+    pjmedia_dir         media_dir;
+
+    /** The conference port number for the call */
+    pjsua_conf_port_id  conf_slot;
+
+    /** Up-to-date call connected duration (zero when call is not 
+     *  established)
+     */
     pj_time_val         connect_duration;
+
+    /** Total call duration, including set-up time */
     pj_time_val         total_duration;
-    pj_bool_t           has_media;
-    pjsua_conf_port_id  conf_slot;
-};
-
-typedef struct pjsua_call_info pjsua_call_info;
-
-
-enum pjsua_buddy_status
-{
-    PJSUA_BUDDY_STATUS_UNKNOWN,
-    PJSUA_BUDDY_STATUS_ONLINE,
-    PJSUA_BUDDY_STATUS_OFFLINE,
-};
-
-typedef enum pjsua_buddy_status pjsua_buddy_status;
-
-
-/**
- * Buddy info.
- */
-struct pjsua_buddy_info
-{
-    pjsua_buddy_id      index;
-    pj_bool_t           is_valid;
+
+    /** Internal */
+    struct {
+        char    local_info[128];
+        char    local_contact[128];
+        char    remote_info[128];
+        char    remote_contact[128];
+        char    call_id[128];
+        char    last_status_text[128];
+    } buf_;
+
+} pjsua_call_info;
+
+
+
+
+/**
+ * Conference port info.
+ */
+typedef struct pjsua_conf_port_info
+{
+    /** Conference port number. */
+    pjsua_conf_port_id  slot_id;
+
+    /** Port name. */
     pj_str_t            name;
-    pj_str_t            display_name;
-    pj_str_t            host;
-    unsigned            port;
-    pj_str_t            uri;
-    pjsua_buddy_status  status;
-    pj_str_t            status_text;
-    pj_bool_t           monitor;
-};
-
-typedef struct pjsua_buddy_info pjsua_buddy_info;
-
-
-/**
- * Account info.
- */
-struct pjsua_acc_info
-{
-    pjsua_acc_id        index;
-    pj_str_t            acc_id;
-    pj_bool_t           has_registration;
-    int                 expires;
-    pjsip_status_code   status;
-    pj_str_t            status_text;
-    pj_bool_t           online_status;
-    char                buf[PJ_ERR_MSG_SIZE];
-};
-
-typedef struct pjsua_acc_info pjsua_acc_info;
-
-
-/**
- * Conference port info.
- */
-struct pjsua_conf_port_info
-{
-    pjsua_conf_port_id  slot_id;
-    pj_str_t            name;
+
+    /** Clock rate. */
     unsigned            clock_rate;
+
+    /** Number of channels. */
     unsigned            channel_count;
+
+    /** Samples per frame */
     unsigned            samples_per_frame;
+
+    /** Bits per sample */
     unsigned            bits_per_sample;
+
+    /** Number of listeners in the array. */
     unsigned            listener_cnt;
-    pjsua_conf_port_id  listeners[256];
-};
-
-
-typedef struct pjsua_conf_port_info pjsua_conf_port_info;
+
+    /** Array of listeners (in other words, ports where this port is 
+     *  transmitting to.
+     */
+    pjsua_conf_port_id  listeners[PJSUA_MAX_CONF_PORTS];
+
+} pjsua_conf_port_info;
+
+
+/**
+ * This structure holds information about custom media transport to
+ * be registered to pjsua.
+ */
+typedef struct pjsua_media_transport
+{
+    /**
+     * Media socket information containing the address information
+     * of the RTP and RTCP socket.
+     */
+    pjmedia_sock_info    skinfo;
+
+    /**
+     * The media transport instance.
+     */
+    pjmedia_transport   *transport;
+
+} pjsua_media_transport;
+
+
+/**
+ * This structure describes additional information to be sent with
+ * outgoing SIP message.
+ */
+typedef struct pjsua_msg_data
+{
+    /**
+     * Additional message headers as linked list.
+     */
+    pjsip_hdr   hdr_list;
+
+    /**
+     * MIME type of optional message body. 
+     */
+    pj_str_t    content_type;
+
+    /**
+     * Optional message body.
+     */
+    pj_str_t    msg_body;
+
+} pjsua_msg_data;
+
+
+/**
+ * Initialize message data.
+ *
+ * @param msg_data  Message data to be initialized.
+ */
+PJ_INLINE(void) pjsua_msg_data_init(pjsua_msg_data *msg_data)
+{
+    pj_memset(msg_data, 0, sizeof(*msg_data));
+    pj_list_init(&msg_data->hdr_list);
+}
 
 
 /*****************************************************************************
- * PJSUA API (defined in pjsua_core.c).
- */
-
-/**
- * Initialize pjsua settings with default parameters.
- */
-PJ_DECL(void) pjsua_default_config(pjsua_config *cfg);
-
-
-/**
- * Validate configuration.
- */
-PJ_DECL(pj_status_t) pjsua_test_config(const pjsua_config *cfg,
-                                       char *errmsg,
-                                       int len);
-
-
-/**
- * Instantiate pjsua application. This initializes pjlib/pjlib-util, and 
- * creates memory pool factory to be used by application.
+ * PJSUA Core API
+ */
+
+
+/**
+ * Instantiate pjsua application. Application must call this function before
+ * calling any other functions, to make sure that the underlying libraries
+ * are properly initialized. Once this function has returned success,
+ * application must call pjsua_destroy() before quitting.
+ *
+ * @return              PJ_SUCCESS on success, or the appropriate error code.
  */
 PJ_DECL(pj_status_t) pjsua_create(void);
@@ -449 +1078 @@
 
 /**
- * Initialize pjsua application with the specified settings.
- *
- * This will initialize all libraries, create endpoint instance, and register
- * pjsip modules. 
- *
- * Application may register module after calling this function.
- */
-PJ_DECL(pj_status_t) pjsua_init(const pjsua_config *cfg,
-                                const pjsua_callback *cb);
-
-
-/**
- * Start pjsua stack. Application calls this after pjsua settings has been
- * configured.
- *
- * This will start the transport, worker threads (if any), and registration 
- * process, if registration is configured.
+ * Initialize pjsua with the specified settings. All the settings are 
+ * optional, and the default values will be used when the config is not
+ * specified.
+ *
+ * @param ua_cfg        User agent configuration.
+ * @param log_cfg       Optional logging configuration.
+ * @param media_cfg     Optional media configuration.
+ *
+ * @return              PJ_SUCCESS on success, or the appropriate error code.
+ */
+PJ_DECL(pj_status_t) pjsua_init(const pjsua_config *ua_cfg,
+                                const pjsua_logging_config *log_cfg,
+                                const pjsua_media_config *media_cfg);
+
+
+/**
+ * Application is recommended to call this function after all initialization
+ * is done, so that the library can do additional checking set up
+ * additional 
+ *
+ * @return              PJ_SUCCESS on success, or the appropriate error code.
  */
 PJ_DECL(pj_status_t) pjsua_start(void);
 
-/**
- * Destroy pjsua.
+
+/**
+ * Destroy pjsua. This function must be called once PJSUA is created. To
+ * make it easier for application, application may call this function
+ * several times with no danger.
+ *
+ * @return              PJ_SUCCESS on success, or the appropriate error code.
  */
 PJ_DECL(pj_status_t) pjsua_destroy(void);
 
-/**
- * Poll pjsua.
+
+/**
+ * Poll pjsua for events, and if necessary block the caller thread for
+ * the specified maximum interval (in miliseconds).
+ *
+ * @param msec_timeout  Maximum time to wait, in miliseconds.
+ *
+ * @return  The number of events that have been handled during the
+ *          poll. Negative value indicates error, and application
+ *          can retrieve the error as (err = -return_value).
  */
 PJ_DECL(int) pjsua_handle_events(unsigned msec_timeout);
@@ -481 +1127 @@
 
 /**
- * Get SIP endpoint instance.
- * Only valid after pjsua_init().
+ * Create memory pool.
+ *
+ * @param name          Optional pool name.
+ * @param size          Initial size of the pool.
+ * @param increment     Increment size.
+ *
+ * @return              The pool, or NULL when there's no memory.
+ */
+PJ_DECL(pj_pool_t*) pjsua_pool_create(const char *name, pj_size_t init_size,
+                                      pj_size_t increment);
+
+
+/**
+ * Application can call this function at any time (after pjsua_create(), of
+ * course) to change logging settings.
+ *
+ * @param c             Logging configuration.
+ *
+ * @return              PJ_SUCCESS on success, or the appropriate error code.
+ */
+PJ_DECL(pj_status_t) pjsua_reconfigure_logging(const pjsua_logging_config *c);
+
+
+/**
+ * Internal function to get SIP endpoint instance of pjsua, which is
+ * needed for example to register module, create transports, etc.
+ * Probably is only valid after #pjsua_init() is called.
+ * 
+ * @return              SIP endpoint instance.
  */
 PJ_DECL(pjsip_endpoint*) pjsua_get_pjsip_endpt(void);
 
 /**
- * Get media endpoint instance.
- * Only valid after pjsua_init().
+ * Internal function to get media endpoint instance.
+ * Only valid after #pjsua_init() is called.
+ *
+ * @return              Media endpoint instance.
  */
 PJ_DECL(pjmedia_endpt*) pjsua_get_pjmedia_endpt(void);
 
-/**
- * Replace media transport.
- */
-PJ_DECL(pj_status_t) pjsua_set_call_media_transport(unsigned call_index,
-                                                    const pjmedia_sock_info *i,
-                                                    pjmedia_transport *tp);
-
 
 /*****************************************************************************
- * PJSUA Call API (defined in pjsua_call.c).
+ * PJSUA SIP Transport API.
+ */
+
+/**
+ * Create SIP transport.
+ *
+ * @param type          Transport type.
+ * @param cfg           Transport configuration.
+ * @param p_id          Optional pointer to receive transport ID.
+ *
+ * @return              PJ_SUCCESS on success, or the appropriate error code.
+ */
+PJ_DECL(pj_status_t) pjsua_transport_create(pjsip_transport_type_e type,
+                                            const pjsua_transport_config *cfg,
+                                            pjsua_transport_id *p_id);
+
+/**
+ * Register transport that has been created by application.
+ *
+ * @param tp            Transport instance.
+ * @param p_id          Optional pointer to receive transport ID.
+ *
+ * @return              PJ_SUCCESS on success, or the appropriate error code.
+ */
+PJ_DECL(pj_status_t) pjsua_transport_register(pjsip_transport *tp,
+                                              pjsua_transport_id *p_id);
+
+
+/**
+ * Enumerate all transports currently created in the system.
+ *
+ * @param id            Array to receive transport ids.
+ * @param count         In input, specifies the maximum number of elements.
+ *                      On return, it contains the actual number of elements.
+ *
+ * @return              PJ_SUCCESS on success, or the appropriate error code.
+ */
+PJ_DECL(pj_status_t) pjsua_enum_transports( pjsua_transport_id id[],
+                                            unsigned *count );
+
+
+/**
+ * Get information about transports.
+ *
+ * @param id            Transport ID.
+ * @param info          Pointer to receive transport info.
+ *
+ * @return              PJ_SUCCESS on success, or the appropriate error code.
+ */
+PJ_DECL(pj_status_t) pjsua_transport_get_info(pjsua_transport_id id,
+                                              pjsua_transport_info *info);
+
+
+/**
+ * Disable a transport or re-enable it. By default transport is always 
+ * enabled after it is created. Disabling a transport does not necessarily
+ * close the socket, it will only discard incoming messages and prevent
+ * the transport from being used to send outgoing messages.
+ *
+ * @param id            Transport ID.
+ * @param enabled       Non-zero to enable, zero to disable.
+ *
+ * @return              PJ_SUCCESS on success, or the appropriate error code.
+ */
+PJ_DECL(pj_status_t) pjsua_transport_set_enable(pjsua_transport_id id,
+                                                pj_bool_t enabled);
+
+
+/**
+ * Close the transport. If transport is forcefully closed, it will be
+ * immediately closed, and any pending transactions that are using the
+ * transport may not terminate properly. Otherwise, the system will wait
+ * until all transactions are closed while preventing new users from
+ * using the transport, and will close the transport when it is safe to
+ * do so.
+ *
+ * @param id            Transport ID.
+ * @param force         Non-zero to immediately close the transport. This
+ *                      is not recommended!
+ *
+ * @return              PJ_SUCCESS on success, or the appropriate error code.
+ */
+PJ_DECL(pj_status_t) pjsua_transport_close( pjsua_transport_id id,
+                                            pj_bool_t force );
+
+
+/*****************************************************************************
+ * PJSUA Media Transport.
+ */
+
+/**
+ * Create UDP media transports for all the calls. This function creates
+ * one UDP media transport for each call.
+ *
+ * @param cfg           Media transport configuration. The "port" field in the
+ *                      configuration is used as the start port to bind the
+ *                      sockets.
+ *
+ * @return              PJ_SUCCESS on success, or the appropriate error code.
+ */
+PJ_DECL(pj_status_t) 
+pjsua_media_transports_create(const pjsua_transport_config *cfg);
+
+
+/**
+ * Register custom media transports to be used by calls. There must
+ * enough media transports for all calls.
+ *
+ * @param tp            The media transport array.
+ * @param count         Number of elements in the array. This number MUST
+ *                      match the number of maximum calls configured when
+ *                      pjsua is created.
+ * @param auto_delete   Flag to indicate whether the transports should be
+ *                      destroyed when pjsua is shutdown.
+ *
+ * @return              PJ_SUCCESS on success, or the appropriate error code.
+ */
+PJ_DECL(pj_status_t) 
+pjsua_media_transports_attach( pjsua_media_transport tp[],
+                               unsigned count,
+                               pj_bool_t auto_delete);
+
+
+
+/*****************************************************************************
+ * PJSUA Call API.
  */
 
 /**
  * Get maximum number of calls configured in pjsua.
+ *
+ * @return              Maximum number of calls configured.
  */
 PJ_DECL(unsigned) pjsua_call_get_max_count(void);
 
 /**
- * Get current number of active calls.
+ * Get number of currently active calls.
+ *
+ * @return              Number of currently active calls.
  */
 PJ_DECL(unsigned) pjsua_call_get_count(void);
+
+/**
+ * Enumerate all active calls.
+ *
+ * @param ids           Array of account IDs to be initialized.
+ * @param count         In input, specifies the maximum number of elements.
+ *                      On return, it contains the actual number of elements.
+ *
+ * @return              PJ_SUCCESS on success, or the appropriate error code.
+ */
+PJ_DECL(pj_status_t) pjsua_enum_calls(pjsua_call_id ids[],
+                                      unsigned *count);
+
+
+/**
+ * Make outgoing call to the specified URI using the specified account.
+ *
+ * @param acc_id        The account to be used.
+ * @param target        URI to be put in the request URI.
+ * @param dst_uri       URI to be put in the To header (normally is the same
+ *                      as the target URI).
+ * @param options       Options (must be zero at the moment).
+ * @param user_data     Arbitrary user data to be attached to the call, and
+ *                      can be retrieved later.
+ * @param msg_data      Optional headers etc to be added to outgoing INVITE
+ *                      request, or NULL if no custom header is desired.
+ * @param p_call_id     Pointer to receive call identification.
+ *
+ * @return              PJ_SUCCESS on success, or the appropriate error code.
+ */
+PJ_DECL(pj_status_t) pjsua_call_make_call(pjsua_acc_id acc_id,
+                                          const pj_str_t *dst_uri,
+                                          unsigned options,
+                                          void *user_data,
+                                          const pjsua_msg_data *msg_data,
+                                          pjsua_call_id *p_call_id);
+
 
 /**
  * Check if the specified call has active INVITE session and the INVITE
  * session has not been disconnected.
- */
-PJ_DECL(pj_bool_t) pjsua_call_is_active(unsigned call_index);
-
-
-/**
- * Check if call has a media session.
- */
-PJ_DECL(pj_bool_t) pjsua_call_has_media(unsigned call_index);
-
-
-/**
- * Get call info.
- */
-PJ_DECL(pj_status_t) pjsua_call_get_info(unsigned call_index,
+ *
+ * @param call_id       Call identification.
+ *
+ * @return              Non-zero if call is active.
+ */
+PJ_DECL(pj_bool_t) pjsua_call_is_active(pjsua_call_id call_id);
+
+
+/**
+ * Check if call has an active media session.
+ *
+ * @param call_id       Call identification.
+ *
+ * @return              Non-zero if yes.
+ */
+PJ_DECL(pj_bool_t) pjsua_call_has_media(pjsua_call_id call_id);
+
+
+/**
+ * Get the conference port identification associated with the call.
+ *
+ * @param call_id       Call identification.
+ *
+ * @return              Conference port ID, or PJSUA_INVALID_ID when the 
+ *                      media has not been established or is not active.
+ */
+PJ_DECL(pjsua_conf_port_id) pjsua_call_get_conf_port(pjsua_call_id call_id);
+
+/**
+ * Obtain detail information about the specified call.
+ *
+ * @param call_id       Call identification.
+ * @param info          Call info to be initialized.
+ *
+ * @return              PJ_SUCCESS on success, or the appropriate error code.
+ */
+PJ_DECL(pj_status_t) pjsua_call_get_info(pjsua_call_id call_id,
                                          pjsua_call_info *info);
 
 
 /**
- * Duplicate call info.
- */
-PJ_DECL(void) pjsua_call_info_dup(pj_pool_t *pool,
-                                  pjsua_call_info *dst_info,
-                                  const pjsua_call_info *src_info);
-
-
-/**
- * Make outgoing call.
- */
-PJ_DECL(pj_status_t) pjsua_call_make_call(unsigned acc_id,
-                                          const pj_str_t *dst_uri,
-                                          int *p_call_index);
-
-
-/**
- * Answer call.
- */
-PJ_DECL(pj_status_t) pjsua_call_answer(int call_index, int code);
-
-/**
- * Hangup call.
- */
-PJ_DECL(void) pjsua_call_hangup(int call_index);
-
-
-/**
- * Put call on-hold.
- */
-PJ_DECL(pj_status_t) pjsua_call_set_hold(int call_index);
+ * Attach application specific data to the call.
+ *
+ * @param call_id       Call identification.
+ * @param user_data     Arbitrary data to be attached to the call.
+ *
+ * @return              The user data.
+ */
+PJ_DECL(pj_status_t) pjsua_call_set_user_data(pjsua_call_id call_id,
+                                              void *user_data);
+
+
+/**
+ * Get user data attached to the call.
+ *
+ * @param call_id       Call identification.
+ *
+ * @return              The user data.
+ */
+PJ_DECL(void*) pjsua_call_get_user_data(pjsua_call_id call_id);
+
+
+/**
+ * Send response to incoming INVITE request.
+ *
+ * @param call_id       Incoming call identification.
+ * @param code          Status code, (100-699).
+ * @param reason        Optional reason phrase. If NULL, default text
+ *                      will be used.
+ * @param msg_data      Optional list of headers etc to be added to outgoing
+ *                      response message.
+ *
+ * @return              PJ_SUCCESS on success, or the appropriate error code.
+ */
+PJ_DECL(pj_status_t) pjsua_call_answer(pjsua_call_id call_id, 
+                                       unsigned code,
+                                       const pj_str_t *reason,
+                                       const pjsua_msg_data *msg_data);
+
+/**
+ * Hangup call by using method that is appropriate according to the
+ * call state.
+ *
+ * @param call_id       Call identification.
+ * @param code          Optional status code to be sent when we're rejecting
+ *                      incoming call. If the value is zero, "603/Decline"
+ *                      will be sent.
+ * @param reason        Optional reason phrase to be sent when we're rejecting
+ *                      incoming call.  If NULL, default text will be used.
+ * @param msg_data      Optional list of headers etc to be added to outgoing
+ *                      request/response message.
+ *
+ * @return              PJ_SUCCESS on success, or the appropriate error code.
+ */
+PJ_DECL(pj_status_t) pjsua_call_hangup(pjsua_call_id call_id,
+                                       unsigned code,
+                                       const pj_str_t *reason,
+                                       const pjsua_msg_data *msg_data);
+
+
+/**
+ * Put the specified call on hold.
+ *
+ * @param call_id       Call identification.
+ * @param msg_data      Optional message components to be sent with
+ *                      the request.
+ *
+ * @return              PJ_SUCCESS on success, or the appropriate error code.
+ */
+PJ_DECL(pj_status_t) pjsua_call_set_hold(pjsua_call_id call_id,
+                                         const pjsua_msg_data *msg_data);
 
 
 /**
  * Send re-INVITE (to release hold).
- */
-PJ_DECL(pj_status_t) pjsua_call_reinvite(int call_index);
-
-
-/**
- * Transfer call.
- */
-PJ_DECL(pj_status_t) pjsua_call_xfer(unsigned call_index, const pj_str_t *dest);
-
-/**
- * Dial DTMF.
- */
-PJ_DECL(pj_status_t) pjsua_call_dial_dtmf(unsigned call_index, 
+ *
+ * @param call_id       Call identification.
+ * @param unhold        If this argument is non-zero and the call is locally
+ *                      held, this will release the local hold.
+ * @param msg_data      Optional message components to be sent with
+ *                      the request.
+ *
+ * @return              PJ_SUCCESS on success, or the appropriate error code.
+ */
+PJ_DECL(pj_status_t) pjsua_call_reinvite(pjsua_call_id call_id,
+                                         pj_bool_t unhold,
+                                         const pjsua_msg_data *msg_data);
+
+
+/**
+ * Initiate call transfer to the specified address.
+ *
+ * @param call_id       Call identification.
+ * @param dest          Address of new target to be contacted.
+ * @param msg_data      Optional message components to be sent with
+ *                      the request.
+ *
+ * @return              PJ_SUCCESS on success, or the appropriate error code.
+ */
+PJ_DECL(pj_status_t) pjsua_call_xfer(pjsua_call_id call_id, 
+                                     const pj_str_t *dest,
+                                     const pjsua_msg_data *msg_data);
+
+/**
+ * Send DTMF digits to remote using RFC 2833 payload formats.
+ *
+ * @param call_id       Call identification.
+ * @param digits        DTMF digits to be sent.
+ *
+ * @return              PJ_SUCCESS on success, or the appropriate error code.
+ */
+PJ_DECL(pj_status_t) pjsua_call_dial_dtmf(pjsua_call_id call_id, 
                                           const pj_str_t *digits);
 
-
 /**
  * Send instant messaging inside INVITE session.
- */
-PJ_DECL(pj_status_t) pjsua_call_send_im(int call_index, const pj_str_t *text);
+ *
+ * @param call_id       Call identification.
+ * @param mime_type     Optional MIME type. If NULL, then "text/plain" is 
+ *                      assumed.
+ * @param content       The message content.
+ * @param msg_data      Optional list of headers etc to be included in outgoing
+ *                      request. The body descriptor in the msg_data is 
+ *                      ignored.
+ * @param user_data     Optional user data, which will be given back when
+ *                      the IM callback is called.
+ *
+ * @return              PJ_SUCCESS on success, or the appropriate error code.
+ */
+PJ_DECL(pj_status_t) pjsua_call_send_im( pjsua_call_id call_id, 
+                                         const pj_str_t *mime_type,
+                                         const pj_str_t *content,
+                                         const pjsua_msg_data *msg_data,
+                                         void *user_data);
 
 
 /**
  * Send IM typing indication inside INVITE session.
- */
-PJ_DECL(pj_status_t) pjsua_call_send_typing_ind(int call_index, 
-                                                pj_bool_t is_typing);
+ *
+ * @param call_id       Call identification.
+ * @param is_typing     Non-zero to indicate to remote that local person is
+ *                      currently typing an IM.
+ * @param msg_data      Optional list of headers etc to be included in outgoing
+ *                      request.
+ *
+ * @return              PJ_SUCCESS on success, or the appropriate error code.
+ */
+PJ_DECL(pj_status_t) pjsua_call_send_typing_ind(pjsua_call_id call_id, 
+                                                pj_bool_t is_typing,
+                                                const pjsua_msg_data*msg_data);
 
 /**
@@ -605 +1550 @@
 /**
  * Dump call and media statistics to string.
- */
-PJ_DECL(void) pjsua_call_dump(int call_index, int with_media, 
-                              char *buffer, unsigned maxlen,
-                              const char *indent);
+ *
+ * @param call_id       Call identification.
+ * @param with_media    Non-zero to include media information too.
+ * @param buffer        Buffer where the statistics are to be written to.
+ * @param maxlen        Maximum length of buffer.
+ * @param indent        Spaces for left indentation.
+ *
+ * @return              PJ_SUCCESS on success.
+ */
+PJ_DECL(pj_status_t) pjsua_call_dump(pjsua_call_id call_id, 
+                                     pj_bool_t with_media, 
+                                     char *buffer, 
+                                     unsigned maxlen,
+                                     const char *indent);
 
 
 /*****************************************************************************
- * PJSUA Account and Client Registration API (defined in pjsua_reg.c).
- */
-
-
-/**
- * Get number of accounts.
- */
-PJ_DECL(unsigned) pjsua_get_acc_count(void);
-
-/**
- * Get account info.
+ * PJSUA Account and Client Registration API.
+ */
+
+
+/**
+ * Get number of current accounts.
+ *
+ * @return              Current number of accounts.
+ */
+PJ_DECL(unsigned) pjsua_acc_get_count(void);
+
+
+/**
+ * Check if the specified account ID is valid.
+ *
+ * @param acc_id        Account ID to check.
+ *
+ * @return              Non-zero if account ID is valid.
+ */
+PJ_DECL(pj_bool_t) pjsua_acc_is_valid(pjsua_acc_id acc_id);
+
+
+/**
+ * Add a new account to pjsua. PJSUA must have been initialized (with
+ * #pjsua_init()) before calling this function.
+ *
+ * @param cfg           Account configuration.
+ * @param is_default    If non-zero, this account will be set as the default
+ *                      account. The default account will be used when sending
+ *                      outgoing requests (e.g. making call) when no account is
+ *                      specified, and when receiving incoming requests when the
+ *                      request does not match any accounts. It is recommended
+ *                      that default account is set to local/LAN account.
+ * @param p_acc_id      Pointer to receive account ID of the new account.
+ *
+ * @return              PJ_SUCCESS on success, or the appropriate error code.
+ */
+PJ_DECL(pj_status_t) pjsua_acc_add(const pjsua_acc_config *cfg,
+                                   pj_bool_t is_default,
+                                   pjsua_acc_id *p_acc_id);
+
+
+/**
+ * Add a local account. A local account is used to identify local endpoint
+ * instead of a specific user, and for this reason, a transport ID is needed
+ * to obtain the local address information.
+ *
+ * @param tid           Transport ID to generate account address.
+ * @param is_default    If non-zero, this account will be set as the default
+ *                      account. The default account will be used when sending
+ *                      outgoing requests (e.g. making call) when no account is
+ *                      specified, and when receiving incoming requests when the
+ *                      request does not match any accounts. It is recommended
+ *                      that default account is set to local/LAN account.
+ * @param p_acc_id      Pointer to receive account ID of the new account.
+ *
+ * @return              PJ_SUCCESS on success, or the appropriate error code.
+ */
+PJ_DECL(pj_status_t) pjsua_acc_add_local(pjsua_transport_id tid,
+                                         pj_bool_t is_default,
+                                         pjsua_acc_id *p_acc_id);
+
+/**
+ * Delete account.
+ *
+ * @param acc_id        Id of the account to be deleted.
+ *
+ * @return              PJ_SUCCESS on success, or the appropriate error code.
+ */
+PJ_DECL(pj_status_t) pjsua_acc_del(pjsua_acc_id acc_id);
+
+
+/**
+ * Modify account information.
+ *
+ * @param acc_id        Id of the account to be modified.
+ * @param cfg           New account configuration.
+ *
+ * @return              PJ_SUCCESS on success, or the appropriate error code.
+ */
+PJ_DECL(pj_status_t) pjsua_acc_modify(pjsua_acc_id acc_id,
+                                      const pjsua_acc_config *cfg);
+
+
+/**
+ * Modify account's presence status to be advertised to remote/presence
+ * subscribers.
+ *
+ * @param acc_id        The account ID.
+ * @param is_online     True of false.
+ *
+ * @return              PJ_SUCCESS on success, or the appropriate error code.
+ */
+PJ_DECL(pj_status_t) pjsua_acc_set_online_status(pjsua_acc_id acc_id,
+                                                 pj_bool_t is_online);
+
+
+/**
+ * Update registration or perform unregistration. 
+ *
+ * @param acc_id        The account ID.
+ * @param renew         If renew argument is zero, this will start 
+ *                      unregistration process.
+ *
+ * @return              PJ_SUCCESS on success, or the appropriate error code.
+ */
+PJ_DECL(pj_status_t) pjsua_acc_set_registration(pjsua_acc_id acc_id, 
+                                                pj_bool_t renew);
+
+
+/**
+ * Get account information.
+ *
+ * @param acc_id        Account identification.
+ * @param info          Pointer to receive account information.
+ *
+ * @return              PJ_SUCCESS on success, or the appropriate error code.
  */
 PJ_DECL(pj_status_t) pjsua_acc_get_info(pjsua_acc_id acc_id,
@@ -629 +1690 @@
 
 /**
- * Enum accounts id.
- */
-PJ_DECL(pj_status_t) pjsua_acc_enum_id( pjsua_acc_id ids[],
-                                        unsigned *count );
+ * Enum accounts all account ids.
+ *
+ * @param ids           Array of account IDs to be initialized.
+ * @param count         In input, specifies the maximum number of elements.
+ *                      On return, it contains the actual number of elements.
+ *
+ * @return              PJ_SUCCESS on success, or the appropriate error code.
+ */
+PJ_DECL(pj_status_t) pjsua_enum_accs(pjsua_acc_id ids[],
+                                     unsigned *count );
 
 
 /**
  * Enum accounts info.
+ *
+ * @param info          Array of account infos to be initialized.
+ * @param count         In input, specifies the maximum number of elements.
+ *                      On return, it contains the actual number of elements.
+ *
+ * @return              PJ_SUCCESS on success, or the appropriate error code.
  */
 PJ_DECL(pj_status_t) pjsua_acc_enum_info( pjsua_acc_info info[],
@@ -643 +1716 @@
 
 /**
- * Find account for outgoing request.
+ * This is an internal function to find the most appropriate account to
+ * used to reach to the specified URL.
+ *
+ * @param url           The remote URL to reach.
+ *
+ * @return              Account id.
  */
 PJ_DECL(pjsua_acc_id) pjsua_acc_find_for_outgoing(const pj_str_t *url);
 
-/**
- * Find account for incoming request.
+
+/**
+ * This is an internal function to find the most appropriate account to be
+ * used to handle incoming calls.
+ *
+ * @param rdata         The incoming request message.
+ *
+ * @return              Account id.
  */
 PJ_DECL(pjsua_acc_id) pjsua_acc_find_for_incoming(pjsip_rx_data *rdata);
-
-/**
- * Add a new account.
- * This function should be called after pjsua_init().
- * Application should call pjsua_acc_set_registration() to start 
- * registration for this account.
- */
-PJ_DECL(pj_status_t) pjsua_acc_add(const pjsua_acc_config *cfg,
-                                   pjsua_acc_id *acc_id);
-
-/**
- * Delete account.
- */
-PJ_DECL(pj_status_t) pjsua_acc_del(pjsua_acc_id acc_id);
-
-
-/**
- * Set account's presence status.
- */
-PJ_DECL(pj_status_t) pjsua_acc_set_online_status(pjsua_acc_id acc_id,
-                                                 pj_bool_t is_online);
-
-
-/**
- * Update registration or perform unregistration. If renew argument is zero,
- * this will start unregistration process.
- */
-PJ_DECL(pj_status_t) pjsua_acc_set_registration(pjsua_acc_id acc_id, 
-                                                pj_bool_t renew);
-
 
 
@@ -689 +1743 @@
 
 /**
- * Get buddy count.
+ * Get total number of buddies.
+ *
+ * @return              Number of buddies.
  */
 PJ_DECL(unsigned) pjsua_get_buddy_count(void);
@@ -695 +1751 @@
 
 /**
- * Get buddy info.
- */
-PJ_DECL(pj_status_t) pjsua_buddy_get_info(pjsua_buddy_id buddy_index,
+ * Check if buddy ID is valid.
+ *
+ * @param buddy_id      Buddy ID to check.
+ *
+ * @return              Non-zero if buddy ID is valid.
+ */
+PJ_DECL(pj_bool_t) pjsua_buddy_is_valid(pjsua_buddy_id buddy_id);
+
+
+/**
+ * Enum buddy IDs.
+ *
+ * @param ids           Array of ids to be initialized.
+ * @param count         On input, specifies max elements in the array.
+ *                      On return, it contains actual number of elements
+ *                      that have been initialized.
+ *
+ * @return              PJ_SUCCESS on success, or the appropriate error code.
+ */
+PJ_DECL(pj_status_t) pjsua_enum_buddies(pjsua_buddy_id ids[],
+                                        unsigned *count);
+
+/**
+ * Get detailed buddy info.
+ *
+ * @param buddy_id      The buddy identification.
+ * @param info          Pointer to receive information about buddy.
+ *
+ * @return              PJ_SUCCESS on success, or the appropriate error code.
+ */
+PJ_DECL(pj_status_t) pjsua_buddy_get_info(pjsua_buddy_id buddy_id,
                                           pjsua_buddy_info *info);
 
 /**
  * Add new buddy.
- */
-PJ_DECL(pj_status_t) pjsua_buddy_add(const pj_str_t *uri,
-                                     pjsua_buddy_id *buddy_index);
+ *
+ * @param cfg           Buddy configuration.
+ * @param p_buddy_id    Pointer to receive buddy ID.
+ *
+ * @return              PJ_SUCCESS on success, or the appropriate error code.
+ */
+PJ_DECL(pj_status_t) pjsua_buddy_add(const pjsua_buddy_config *cfg,
+                                     pjsua_buddy_id *p_buddy_id);
 
 
 /**
  * Delete buddy.
- */
-PJ_DECL(pj_status_t) pjsua_buddy_del(pjsua_buddy_id buddy_index);
+ *
+ * @param buddy_id      Buddy identification.
+ *
+ * @return              PJ_SUCCESS on success, or the appropriate error code.
+ */
+PJ_DECL(pj_status_t) pjsua_buddy_del(pjsua_buddy_id buddy_id);
 
 
 /**
  * Enable/disable buddy's presence monitoring.
- */
-PJ_DECL(pj_status_t) pjsua_buddy_subscribe_pres(pjsua_buddy_id buddy_index,
-                                                pj_bool_t monitor);
-
-
-/**
- * Dump presence subscriptions.
- */
-PJ_DECL(void) pjsua_pres_dump(pj_bool_t detail);
+ *
+ * @param buddy_id      Buddy identification.
+ * @param subscribe     Specify non-zero to activate presence subscription to
+ *                      the specified buddy.
+ *
+ * @return              PJ_SUCCESS on success, or the appropriate error code.
+ */
+PJ_DECL(pj_status_t) pjsua_buddy_subscribe_pres(pjsua_buddy_id buddy_id,
+                                                pj_bool_t subscribe);
+
+
+/**
+ * Dump presence subscriptions to log file.
+ *
+ * @param verbose       Yes or no.
+ */
+PJ_DECL(void) pjsua_pres_dump(pj_bool_t verbose);
 
 
@@ -738 +1839 @@
 
 /**
- * Send IM outside dialog.
- */
-PJ_DECL(pj_status_t) pjsua_im_send(int acc_id, const pj_str_t *dst_uri, 
-                                   const pj_str_t *text);
+ * Send instant messaging outside dialog, using the specified account for
+ * route set and authentication.
+ *
+ * @param acc_id        Account ID to be used to send the request.
+ * @param to            Remote URI.
+ * @param mime_type     Optional MIME type. If NULL, then "text/plain" is 
+ *                      assumed.
+ * @param content       The message content.
+ * @param msg_data      Optional list of headers etc to be included in outgoing
+ *                      request. The body descriptor in the msg_data is 
+ *                      ignored.
+ * @param user_data     Optional user data, which will be given back when
+ *                      the IM callback is called.
+ *
+ * @return              PJ_SUCCESS on success, or the appropriate error code.
+ */
+PJ_DECL(pj_status_t) pjsua_im_send(pjsua_acc_id acc_id, 
+                                   const pj_str_t *to,
+                                   const pj_str_t *mime_type,
+                                   const pj_str_t *content,
+                                   const pjsua_msg_data *msg_data,
+                                   void *user_data);
 
 
 /**
  * Send typing indication outside dialog.
- */
-PJ_DECL(pj_status_t) pjsua_im_typing(int acc_id, const pj_str_t *dst_uri, 
-                                     pj_bool_t is_typing);
+ *
+ * @param acc_id        Account ID to be used to send the request.
+ * @param to            Remote URI.
+ * @param is_typing     If non-zero, it tells remote person that local person
+ *                      is currently composing an IM.
+ * @param msg_data      Optional list of headers etc to be added to outgoing
+ *                      request.
+ *
+ * @return              PJ_SUCCESS on success, or the appropriate error code.
+ */
+PJ_DECL(pj_status_t) pjsua_im_typing(pjsua_acc_id acc_id, 
+                                     const pj_str_t *to, 
+                                     pj_bool_t is_typing,
+                                     const pjsua_msg_data *msg_data);
 
 
 
 /*****************************************************************************
- * Media.
+ * Conference bridge manipulation.
  */
 
 /**
  * Get maxinum number of conference ports.
- */
-PJ_DECL(unsigned) pjsua_conf_max_ports(void);
-
-
-/**
- * Enum all conference ports.
- */
-PJ_DECL(pj_status_t) pjsua_conf_enum_port_ids(pjsua_conf_port_id id[],
-                                              unsigned *count);
+ *
+ * @return              Maximum number of ports in the conference bridge.
+ */
+PJ_DECL(unsigned) pjsua_conf_get_max_ports(void);
+
+
+/**
+ * Get current number of active ports in the bridge.
+ *
+ * @return              The number.
+ */
+PJ_DECL(unsigned) pjsua_conf_get_active_ports(void);
+
+
+/**
+ * Enumerate all conference ports.
+ *
+ * @param id            Array of conference port ID to be initialized.
+ * @param count         On input, specifies max elements in the array.
+ *                      On return, it contains actual number of elements
+ *                      that have been initialized.
+ *
+ * @return              PJ_SUCCESS on success, or the appropriate error code.
+ */
+PJ_DECL(pj_status_t) pjsua_enum_conf_ports(pjsua_conf_port_id id[],
+                                           unsigned *count);
 
 
 /**
  * Get information about the specified conference port
+ *
+ * @param id            Port identification.
+ * @param info          Pointer to store the port info.
+ *
+ * @return              PJ_SUCCESS on success, or the appropriate error code.
  */
 PJ_DECL(pj_status_t) pjsua_conf_get_port_info( pjsua_conf_port_id id,
@@ -777 +1929 @@
 
 /**
- * Connect conference port.
- */
-PJ_DECL(pj_status_t) pjsua_conf_connect(pjsua_conf_port_id src_port,
-                                        pjsua_conf_port_id dst_port);
-
-
-/**
- * Connect conference port connection.
- */
-PJ_DECL(pj_status_t) pjsua_conf_disconnect(pjsua_conf_port_id src_port,
-                                           pjsua_conf_port_id dst_port);
-
-
-/**
- * Create a file player.
+ * Establish unidirectional media flow from souce to sink. One source
+ * may transmit to multiple destinations/sink. And if multiple
+ * sources are transmitting to the same sink, the media will be mixed
+ * together. Source and sink may refer to the same ID, effectively
+ * looping the media.
+ *
+ * If bidirectional media flow is desired, application needs to call
+ * this function twice, with the second one having the arguments
+ * reversed.
+ *
+ * @param source        Port ID of the source media/transmitter.
+ * @param sink          Port ID of the destination media/received.
+ *
+ * @return              PJ_SUCCESS on success, or the appropriate error code.
+ */
+PJ_DECL(pj_status_t) pjsua_conf_connect(pjsua_conf_port_id source,
+                                        pjsua_conf_port_id sink);
+
+
+/**
+ * Disconnect media flow from the source to destination port.
+ *
+ * @param source        Port ID of the source media/transmitter.
+ * @param sink          Port ID of the destination media/received.
+ *
+ * @return              PJ_SUCCESS on success, or the appropriate error code.
+ */
+PJ_DECL(pj_status_t) pjsua_conf_disconnect(pjsua_conf_port_id source,
+                                           pjsua_conf_port_id sink);
+
+
+/*****************************************************************************
+ * File player.
+ */
+
+/**
+ * Create a file player, and automatically connect this player to
+ * the conference bridge.
+ *
+ * @param filename      The filename to be played. Currently only
+ *                      WAV files are supported.
+ * @param options       Options (currently zero).
+ * @param user_data     Arbitrary user data to be associated with the player.
+ * @param p_id          Pointer to receive player ID.
+ *
+ * @return              PJ_SUCCESS on success, or the appropriate error code.
  */
 PJ_DECL(pj_status_t) pjsua_player_create(const pj_str_t *filename,
-                                         pjsua_player_id *id);
-
-
-/**
- * Get conference port associated with player.
+                                         unsigned options,
+                                         void *user_data,
+                                         pjsua_player_id *p_id);
+
+
+/**
+ * Get conference port ID associated with player.
+ *
+ * @param id            The file player ID.
+ *
+ * @return              Conference port ID associated with this player.
  */
 PJ_DECL(pjsua_conf_port_id) pjsua_player_get_conf_port(pjsua_player_id id);
@@ -805 +1994 @@
 /**
  * Set playback position.
+ *
+ * @param id            The file player ID.
+ * @param samples       The playback position, in samples. Application can
+ *                      specify zero to re-start the playback.
+ *
+ * @return              PJ_SUCCESS on success, or the appropriate error code.
  */
 PJ_DECL(pj_status_t) pjsua_player_set_pos(pjsua_player_id id,
@@ -811 +2006 @@
 
 /**
- * Destroy player.
+ * Close the file, remove the player from the bridge, and free
+ * resources associated with the file player.
+ *
+ * @param id            The file player ID.
+ *
+ * @return              PJ_SUCCESS on success, or the appropriate error code.
  */
 PJ_DECL(pj_status_t) pjsua_player_destroy(pjsua_player_id id);
 
 
-
-/**
- * Create a file recorder.
+/*****************************************************************************
+ * File recorder.
+ */
+
+/**
+ * Create a file recorder, and automatically connect this recorder to
+ * the conference bridge.
+ *
+ * @param filename      Output file name.
+ * @param file_format   Specify the file format (currently only WAV is
+ *                      supported, so the value MUST be zero).
+ * @param encoding      Specify the encoding to be applied to the file.
+ *                      Currently only 16bit raw PCM is supported, so
+ *                      the value must be NULL.
+ * @param max_size      Maximum file size. Specify -1 to remove size
+ *                      limitation.
+ * @param options       Optional options.
+ * @param user_data     Arbitrary user data which will be given in the 
+ *                      callback once the recording complete.
+ * @param p_id          Pointer to receive the recorder instance.
+ *
+ * @return              PJ_SUCCESS on success, or the appropriate error code.
  */
 PJ_DECL(pj_status_t) pjsua_recorder_create(const pj_str_t *filename,
-                                           pjsua_recorder_id *id);
+                                           unsigned file_format,
+                                           const pj_str_t *encoding,
+                                           pj_ssize_t max_size,
+                                           unsigned options,
+                                           void *user_data,
+                                           pjsua_recorder_id *p_id);
 
 
 /**
  * Get conference port associated with recorder.
+ *
+ * @param id            The recorder ID.
+ *
+ * @return              Conference port ID associated with this recorder.
  */
 PJ_DECL(pjsua_conf_port_id) pjsua_recorder_get_conf_port(pjsua_recorder_id id);
@@ -831 +2059 @@
 
 /**
- * Destroy recorder (will complete recording).
+ * Destroy recorder (this will complete recording).
+ *
+ * @param id            The recorder ID.
+ *
+ * @return              PJ_SUCCESS on success, or the appropriate error code.
  */
 PJ_DECL(pj_status_t) pjsua_recorder_destroy(pjsua_recorder_id id);
 
 
+/*****************************************************************************
+ * Sound devices.
+ */
+
 /**
  * Enum sound devices.
- */
-PJ_DECL(pj_status_t) pjsua_enum_snd_devices(unsigned *count,
-                                            pjmedia_snd_dev_info info[]);
-
-
-/**
- * Select or change sound device.
- * This will only change the device ID in configuration (not changing
- * the current device).
- */
-PJ_DECL(pj_status_t) pjsua_set_snd_dev(int snd_capture_id,
-                                       int snd_player_id);
+ *
+ * @param info          Array of info to be initialized.
+ * @param count         On input, specifies max elements in the array.
+ *                      On return, it contains actual number of elements
+ *                      that have been initialized.
+ *
+ * @return              PJ_SUCCESS on success, or the appropriate error code.
+ */
+PJ_DECL(pj_status_t) pjsua_enum_snd_devs(pjmedia_snd_dev_info info[],
+                                         unsigned *count);
+
+
+/**
+ * Select or change sound device. Application may call this function at
+ * any time to replace current sound device.
+ *
+ * @param capture_dev   Device ID of the capture device.
+ * @param playback_dev  Device ID of the playback device.
+ *
+ * @return              PJ_SUCCESS on success, or the appropriate error code.
+ */
+PJ_DECL(pj_status_t) pjsua_set_snd_dev(int capture_dev,
+                                       int playback_dev);
+
+
+/**
+ * Set pjsua to use null sound device. The null sound device only provides
+ * the timing needed by the conference bridge, and will not interract with
+ * any hardware.
+ *
+ * @return              PJ_SUCCESS on success, or the appropriate error code.
+ */
+PJ_DECL(pj_status_t) pjsua_set_null_snd_dev(void);
+
+
+/*****************************************************************************
+ * Codecs.
+ */
+
+/**
+ * Enum all supported codecs in the system.
+ *
+ * @param id            Array of ID to be initialized.
+ * @param count         On input, specifies max elements in the array.
+ *                      On return, it contains actual number of elements
+ *                      that have been initialized.
+ *
+ * @return              PJ_SUCCESS on success, or the appropriate error code.
+ */
+PJ_DECL(pj_status_t) pjsua_enum_codecs( pjsua_codec_info id[],
+                                        unsigned *count );
+
+
+/**
+ * Change codec priority.
+ *
+ * @param id            Codec ID.
+ * @param priority      Codec priority, 0-255, where zero means to disable
+ *                      the codec.
+ *
+ * @return              PJ_SUCCESS on success, or the appropriate error code.
+ */
+PJ_DECL(pj_status_t) pjsua_codec_set_priority( const pj_str_t *id,
+                                               pj_uint8_t priority );
+
+
+/**
+ * Get codec parameters.
+ *
+ * @param id            Codec ID.
+ * @param param         Structure to receive codec parameters.
+ *
+ * @return              PJ_SUCCESS on success, or the appropriate error code.
+ */
+PJ_DECL(pj_status_t) pjsua_codec_get_param( const pj_str_t *id,
+                                            pjmedia_codec_param *param );
+
+
+/**
+ * Set codec parameters.
+ *
+ * @param id            Codec ID.
+ * @param param         Codec parameter to set.
+ *
+ * @return              PJ_SUCCESS on success, or the appropriate error code.
+ */
+PJ_DECL(pj_status_t) pjsua_codec_set_param( const pj_str_t *id,
+                                            const pjmedia_codec_param *param);
+
+
+
 
 
@@ -857 +2172 @@
  */
 
-/** String to describe invite session states */
-extern const char *pjsua_inv_state_names[];
-
-/**
- * Parse arguments (pjsua_opt.c).
- */
-PJ_DECL(pj_status_t) pjsua_parse_args(int argc, char *argv[],
-                                      pjsua_config *cfg,
-                                      pj_str_t *uri_to_call);
-
-/**
- * Load settings from a file.
- */
-PJ_DECL(pj_status_t) pjsua_load_settings(const char *filename,
-                                         pjsua_config *cfg,
-                                         pj_str_t *uri_to_call);
-
-/**
- * Get pjsua running config.
- */
-PJ_DECL(void) pjsua_get_config(pj_pool_t *pool,
-                               pjsua_config *config);
-
-
-/**
- * Dump settings.
- * If cfg is NULL, it will dump current settings.
- */
-PJ_DECL(int) pjsua_dump_settings(const pjsua_config *cfg,
-                                 char *buf, pj_size_t max);
-
-/**
- * Save settings to a file.
- */
-PJ_DECL(pj_status_t) pjsua_save_settings(const char *filename,
-                                         const pjsua_config *cfg);
-
-
 /*
  * Verify that valid SIP url is given.
- * @return  PJ_SUCCESS if valid.
+ *
+ * @param c_url         The URL, as NULL terminated string.
+ *
+ * @return              PJ_SUCCESS on success, or the appropriate error code.
  */
 PJ_DECL(pj_status_t) pjsua_verify_sip_url(const char *c_url);
 
-/*
- * Dump application states.
- */
-PJ_DECL(void) pjsua_dump(pj_bool_t detail);
 
 /**
  * Display error message for the specified error code.
+ *
+ * @param sender        The log sender field.
+ * @param title         Message title for the error.
+ * @param status        Status code.
  */
 PJ_DECL(void) pjsua_perror(const char *sender, const char *title, 

pjproject/trunk/pjsip/src/pjsua-lib/pjsua_call.c

@@ -18 +18 @@
  */
 #include <pjsua-lib/pjsua.h>
-#include <pj/log.h>
-#include "pjsua_imp.h"
-
-/*
- * pjsua_call.c
- *
- * Call (INVITE) related stuffs.
- */
-
-#define THIS_FILE   "pjsua_call.c"
-
-
-#define REFRESH_CALL_TIMER      0x63
-#define HANGUP_CALL_TIMER       0x64
-
-/* Proto */
-static void schedule_call_timer( pjsua_call *call, pj_timer_entry *e,
-                                 int timer_type, int duration );
-
-/*
- * Timer callback when UAS needs to send re-INVITE to see if remote
- * is still there.
- */
-static void call_on_timer(pj_timer_heap_t *ht, pj_timer_entry *e)
-{
-    pjsua_call *call = e->user_data;
-
-    PJ_UNUSED_ARG(ht);
-
-    if (e->id == REFRESH_CALL_TIMER) {
-
-        /* If call is still not connected, hangup. */
-        if (call->inv->state != PJSIP_INV_STATE_CONFIRMED) {
-            PJ_LOG(3,(THIS_FILE, "Refresh call timer is called when "
-                      "invite is still not confirmed. Call %d will "
-                      "disconnect.", call->index));
-            pjsua_call_hangup(call->index);
-        } else {
-            PJ_LOG(3,(THIS_FILE, "Refreshing call %d", call->index));
-            schedule_call_timer(call,e,REFRESH_CALL_TIMER,
-                                pjsua.config.uas_refresh);
-            pjsua_call_reinvite(call->index);
-        }
-
-    } else if (e->id == HANGUP_CALL_TIMER) {
-        PJ_LOG(3,(THIS_FILE, "Call %d duration exceeded, disconnecting call",
-                             call->index));
-        pjsua_call_hangup(call->index);
-
-    }
-}
-
-/*
- * Schedule call timer.
- */
-static void schedule_call_timer( pjsua_call *call, pj_timer_entry *e,
-                                 int timer_type, int duration )
-{
-    pj_time_val timeout;
-
-    if (duration == 0) {
-        /* Cancel timer. */
-        if (e->id != 0) {
-            pjsip_endpt_cancel_timer(pjsua.endpt, e);
-            e->id = 0;
-        }
-
-    } else {
-        /* Schedule timer. */
-        timeout.sec = duration;
-        timeout.msec = 0;
-
-        e->cb = &call_on_timer;
-        e->id = timer_type;
-        e->user_data = call;
-
-        pjsip_endpt_schedule_timer( pjsua.endpt, e, &timeout);
-    }
-}
-
-
-/*
- * Destroy the call's media
- */
-static pj_status_t call_destroy_media(int call_index)
-{
-    pjsua_call *call = &pjsua.calls[call_index];
-
-    if (call->conf_slot > 0) {
-        pjmedia_conf_remove_port(pjsua.mconf, call->conf_slot);
-        call->conf_slot = 0;
-    }
-
-    if (call->session) {
-        /* Destroy session (this will also close RTP/RTCP sockets). */
-        pjmedia_session_destroy(call->session);
-        call->session = NULL;
-
-        PJ_LOG(3,(THIS_FILE, "Media session for call %d is destroyed", 
-                             call_index));
-
-    }
-
+#include <pjsua-lib/pjsua_internal.h>
+
+
+#define THIS_FILE               "pjsua_call.c"
+
+
+/* This callback receives notification from invite session when the
+ * session state has changed.
+ */
+static void pjsua_call_on_state_changed(pjsip_inv_session *inv, 
+                                        pjsip_event *e);
+
+/* This callback is called by invite session framework when UAC session
+ * has forked.
+ */
+static void pjsua_call_on_forked( pjsip_inv_session *inv, 
+                                  pjsip_event *e);
+
+/*
+ * Callback to be called when SDP offer/answer negotiation has just completed
+ * in the session. This function will start/update media if negotiation
+ * has succeeded.
+ */
+static void pjsua_call_on_media_update(pjsip_inv_session *inv,
+                                       pj_status_t status);
+
+/*
+ * Called when session received new offer.
+ */
+static void pjsua_call_on_rx_offer(pjsip_inv_session *inv,
+                                   const pjmedia_sdp_session *offer);
+
+/*
+ * This callback is called when transaction state has changed in INVITE
+ * session. We use this to trap:
+ *  - incoming REFER request.
+ *  - incoming MESSAGE request.
+ */
+static void pjsua_call_on_tsx_state_changed(pjsip_inv_session *inv,
+                                            pjsip_transaction *tsx,
+                                            pjsip_event *e);
+
+
+/* Destroy the call's media */
+static pj_status_t call_destroy_media(int call_id);
+
+/* Create inactive SDP for call hold. */
+static pj_status_t create_inactive_sdp(pjsua_call *call,
+                                       pjmedia_sdp_session **p_answer);
+
+
+/*
+ * Reset call descriptor.
+ */
+static void reset_call(pjsua_call_id id)
+{
+    pjsua_call *call = &pjsua_var.calls[id];
+
+    call->index = id;
+    call->inv = NULL;
+    call->user_data = NULL;
+    call->session = NULL;
+    call->xfer_sub = NULL;
+    call->last_code = 0;
+    call->conf_slot = PJSUA_INVALID_ID;
+    call->last_text.ptr = call->last_text_buf_;
+    call->last_text.slen = 0;
+}
+
+
+/*
+ * Init call subsystem.
+ */
+pj_status_t pjsua_call_subsys_init(const pjsua_config *cfg)
+{
+    pjsip_inv_callback inv_cb;
+    unsigned i;
+    pj_status_t status;
+
+    /* Init calls array. */
+    for (i=0; i<PJ_ARRAY_SIZE(pjsua_var.calls); ++i)
+        reset_call(i);
+
+    /* Copy config */
+    pjsua_config_dup(pjsua_var.pool, &pjsua_var.ua_cfg, cfg);
+
+    /* Initialize invite session callback. */
+    pj_memset(&inv_cb, 0, sizeof(inv_cb));
+    inv_cb.on_state_changed = &pjsua_call_on_state_changed;
+    inv_cb.on_new_session = &pjsua_call_on_forked;
+    inv_cb.on_media_update = &pjsua_call_on_media_update;
+    inv_cb.on_rx_offer = &pjsua_call_on_rx_offer;
+    inv_cb.on_tsx_state_changed = &pjsua_call_on_tsx_state_changed;
+
+
+    /* Initialize invite session module: */
+    status = pjsip_inv_usage_init(pjsua_var.endpt, &inv_cb);
+    PJ_ASSERT_RETURN(status == PJ_SUCCESS, status);
+
+    return status;
+}
+
+
+/*
+ * Start call subsystem.
+ */
+pj_status_t pjsua_call_subsys_start(void)
+{
+    /* Nothing to do */
     return PJ_SUCCESS;
 }
 
 
-/**
+/*
  * Get maximum number of calls configured in pjsua.
  */
 PJ_DEF(unsigned) pjsua_call_get_max_count(void)
 {
-    return pjsua.config.max_calls;
-}
-
-
-/**
- * Get current number of active calls.
+    return pjsua_var.ua_cfg.max_calls;
+}
+
+
+/*
+ * Get number of currently active calls.
  */
 PJ_DEF(unsigned) pjsua_call_get_count(void)
 {
-    return pjsua.call_cnt;
-}
-
-
-/**
- * Check if the specified call is active.
- */
-PJ_DEF(pj_bool_t) pjsua_call_is_active(unsigned call_index)
-{
-    PJ_ASSERT_RETURN(call_index < pjsua.config.max_calls,
-                     PJ_EINVAL);
-    return pjsua.calls[call_index].inv != NULL &&
-           pjsua.calls[call_index].inv->state != PJSIP_INV_STATE_DISCONNECTED;
-}
-
-/**
- * Check if call has a media session.
- */
-PJ_DEF(pj_bool_t) pjsua_call_has_media(unsigned call_index)
-{
-    PJ_ASSERT_RETURN(call_index < pjsua.config.max_calls, PJ_EINVAL);
-    return pjsua.calls[call_index].session != NULL;
-}
-
-
-/**
- * Get call info.
- */
-PJ_DEF(pj_status_t) pjsua_call_get_info( unsigned call_index,
-                                         pjsua_call_info *info)
-{
-    pjsua_call *call;
-
-    PJ_ASSERT_RETURN(call_index < pjsua.config.max_calls,
-                     PJ_EINVAL);
-
-    pj_memset(info, 0, sizeof(pjsua_call_info));
-
-    call = &pjsua.calls[call_index];
-    info->active = pjsua_call_is_active(call_index);
-
-    if (call->inv == NULL)
-        return PJ_SUCCESS;
-
-    info->index = call_index;
-    info->role = call->inv->role;
-    info->local_info = call->inv->dlg->local.info_str;
-    info->remote_info = call->inv->dlg->remote.info_str;
-    info->state = call->inv->state;
-    info->state_text = pj_str((char*)pjsip_inv_state_name(info->state));
-    
-    if (info->state >= PJSIP_INV_STATE_DISCONNECTED) {
-
-        info->total_duration = call->dis_time;
-        PJ_TIME_VAL_SUB(info->total_duration, call->start_time);
-
-        if (call->conn_time.sec) {
-            info->connect_duration = call->dis_time;
-            PJ_TIME_VAL_SUB(info->total_duration, call->conn_time);
-        }
-
-    } else if (info->state == PJSIP_INV_STATE_CONFIRMED) {
-
-        pj_gettimeofday(&info->total_duration);
-        PJ_TIME_VAL_SUB(info->total_duration, call->start_time);
-
-        pj_gettimeofday(&info->connect_duration);
-        PJ_TIME_VAL_SUB(info->connect_duration, call->conn_time);
-
-    } else {
-        pj_gettimeofday(&info->total_duration);
-        PJ_TIME_VAL_SUB(info->total_duration, call->start_time);
-    }
-
-    info->last_status = call->last_code;
-    info->last_status_text = *pjsip_get_status_text(info->last_status);
-
-    info->has_media = (call->session != NULL);
-    info->conf_slot = call->conf_slot;
+    return pjsua_var.call_cnt;
+}
+
+
+/*
+ * Enum calls.
+ */
+PJ_DEF(pj_status_t) pjsua_enum_calls( pjsua_call_id ids[],
+                                      unsigned *count)
+{
+    unsigned i, c;
+
+    PJ_ASSERT_RETURN(ids && *count, PJ_EINVAL);
+
+    PJSUA_LOCK();
+
+    for (i=0, c=0; c<*count && i<pjsua_var.ua_cfg.max_calls; ++i) {
+        if (!pjsua_var.calls[i].inv)
+            continue;
+        ids[c] = i;
+        ++c;
+    }
+
+    *count = c;
+
+    PJSUA_UNLOCK();
 
     return PJ_SUCCESS;
@@ -223 +176 @@
 
 
-/**
- * Duplicate call info.
- */
-PJ_DEF(void) pjsua_call_info_dup( pj_pool_t *pool,
-                                  pjsua_call_info *dst_info,
-                                  const pjsua_call_info *src_info)
-{
-    PJ_ASSERT_ON_FAIL(pool && dst_info && src_info, return);
-
-    pj_memcpy(dst_info, src_info, sizeof(pjsua_call_info));
-
-    pj_strdup(pool, &dst_info->local_info, &src_info->local_info);
-    pj_strdup(pool, &dst_info->remote_info, &src_info->remote_info);
-    
-    /* state_text and cause_text belong to pjsip, so don't need to be
-     * duplicated because they'll always be available.
-     */
-}
-
-
-/**
- * Make outgoing call.
- */
-PJ_DEF(pj_status_t) pjsua_call_make_call(unsigned acc_index,
-                                         const pj_str_t *dest_uri,
-                                         int *p_call_index)
+/*
+ * Make outgoing call to the specified URI using the specified account.
+ */
+PJ_DEF(pj_status_t) pjsua_call_make_call( pjsua_acc_id acc_id,
+                                          const pj_str_t *dest_uri,
+                                          unsigned options,
+                                          void *user_data,
+                                          const pjsua_msg_data *msg_data,
+                                          pjsua_call_id *p_call_id)
 {
     pjsip_dialog *dlg = NULL;
     pjmedia_sdp_session *offer;
     pjsip_inv_session *inv = NULL;
-    unsigned call_index;
+    pjsua_acc *acc;
+    pjsua_call *call;
+    unsigned call_id;
     pjsip_tx_data *tdata;
     pj_status_t status;
 
 
-    PJ_ASSERT_RETURN(acc_index==0 || acc_index < pjsua.config.acc_cnt, 
+    /* Check that account is valid */
+    PJ_ASSERT_RETURN(acc_id>=0 || acc_id<PJ_ARRAY_SIZE(pjsua_var.acc), 
                      PJ_EINVAL);
 
+    /* Options must be zero for now */
+    PJ_ASSERT_RETURN(options == 0, PJ_EINVAL);
+
+    PJSUA_LOCK();
+
+    acc = &pjsua_var.acc[acc_id];
+    if (!acc->valid) {
+        pjsua_perror(THIS_FILE, "Unable to make call because account "
+                     "is not valid", PJ_EINVALIDOP);
+        PJSUA_UNLOCK();
+        return PJ_EINVALIDOP;
+    }
 
     /* Find free call slot. */
-    for (call_index=0; call_index<pjsua.config.max_calls; ++call_index) {
-        if (pjsua.calls[call_index].inv == NULL)
+    for (call_id=0; call_id<pjsua_var.ua_cfg.max_calls; ++call_id) {
+        if (pjsua_var.calls[call_id].inv == NULL)
             break;
     }
 
-    if (call_index == pjsua.config.max_calls) {
-        PJ_LOG(3,(THIS_FILE, "Error: too many calls!"));
+    if (call_id == pjsua_var.ua_cfg.max_calls) {
+        pjsua_perror(THIS_FILE, "Error making file", PJ_ETOOMANY);
+        PJSUA_UNLOCK();
         return PJ_ETOOMANY;
     }
 
+    call = &pjsua_var.calls[call_id];
+
     /* Mark call start time. */
-    pj_gettimeofday(&pjsua.calls[call_index].start_time);
+    pj_gettimeofday(&call->start_time);
 
     /* Reset first response time */
-    pjsua.calls[call_index].res_time.sec = 0;
+    call->res_time.sec = 0;
 
     /* Create outgoing dialog: */
     status = pjsip_dlg_create_uac( pjsip_ua_instance(), 
-                                   &pjsua.config.acc_config[acc_index].id,
-                                   &pjsua.config.acc_config[acc_index].contact,
-                                   dest_uri, dest_uri,
-                                   &dlg);
+                                   &acc->cfg.id, &acc->cfg.contact,
+                                   dest_uri, dest_uri, &dlg);
     if (status != PJ_SUCCESS) {
         pjsua_perror(THIS_FILE, "Dialog creation failed", status);
+        PJSUA_UNLOCK();
         return status;
     }
@@ -292 +245 @@
     /* Get media capability from media endpoint: */
 
-    status = pjmedia_endpt_create_sdp( pjsua.med_endpt, dlg->pool, 1, 
-                                       &pjsua.calls[call_index].skinfo, 
-                                       &offer);
+    status = pjmedia_endpt_create_sdp( pjsua_var.med_endpt, dlg->pool, 1, 
+                                       &call->skinfo, &offer);
     if (status != PJ_SUCCESS) {
         pjsua_perror(THIS_FILE, "pjmedia unable to create SDP", status);
@@ -311 +263 @@
     /* Create and associate our data in the session. */
 
-    pjsua.calls[call_index].inv = inv;
-
-    dlg->mod_data[pjsua.mod.id] = &pjsua.calls[call_index];
-    inv->mod_data[pjsua.mod.id] = &pjsua.calls[call_index];
-
+    call->inv = inv;
+
+    dlg->mod_data[pjsua_var.mod.id] = call;
+    inv->mod_data[pjsua_var.mod.id] = call;
+
+    /* Attach user data */
+    call->user_data = user_data;
 
     /* Set dialog Route-Set: */
-
-    if (!pj_list_empty(&pjsua.acc[acc_index].route_set))
-        pjsip_dlg_set_route_set(dlg, &pjsua.acc[acc_index].route_set);
+    if (!pj_list_empty(&acc->route_set))
+        pjsip_dlg_set_route_set(dlg, &acc->route_set);
 
 
     /* Set credentials: */
-    if (pjsua.config.acc_config[acc_index].cred_count) {
-        pjsua_acc_config *acc_cfg = &pjsua.config.acc_config[acc_index];
+    if (acc->cred_cnt) {
         pjsip_auth_clt_set_credentials( &dlg->auth_sess, 
-                                        acc_cfg->cred_count,
-                                        acc_cfg->cred_info);
+                                        acc->cred_cnt, acc->cred);
     }
 
@@ -341 +292 @@
     }
 
+
+    /* Add additional headers etc */
+
+    pjsua_process_msg_data( tdata, msg_data);
 
     /* Send initial INVITE: */
@@ -357 +312 @@
     }
 
-
     /* Done. */
 
-    ++pjsua.call_cnt;
-
-    if (p_call_index)
-        *p_call_index = call_index;
+    ++pjsua_var.call_cnt;
+
+    if (p_call_id)
+        *p_call_id = call_id;
+
+    PJSUA_UNLOCK();
 
     return PJ_SUCCESS;
@@ -375 +331 @@
     }
 
-    if (call_index != -1) {
-        pjsua.calls[call_index].inv = NULL;
-    }
-    return status;
-}
-
-
-/**
- * Answer call.
- */
-PJ_DEF(pj_status_t) pjsua_call_answer(int call_index, int code)
-{
-    pjsip_tx_data *tdata;
-    pj_status_t status;
-
-    PJ_ASSERT_RETURN( call_index >= 0 && 
-                      call_index < (int)pjsua.config.max_calls,
-                      PJ_EINVAL);
-
-    if (pjsua.calls[call_index].inv == NULL) {
-        PJ_LOG(3,(THIS_FILE, "Call %d already disconnected"));
-        return PJSIP_ESESSIONTERMINATED;
-    }
-
-    status = pjsip_inv_answer(pjsua.calls[call_index].inv,
-                              code, NULL, NULL, &tdata);
-    if (status == PJ_SUCCESS)
-        status = pjsip_inv_send_msg(pjsua.calls[call_index].inv,
-                                    tdata);
-
-    if (status != PJ_SUCCESS)
-        pjsua_perror(THIS_FILE, "Unable to create/send response", 
-                     status);
-
+    if (call_id != -1) {
+        reset_call(call_id);
+    }
+
+    PJSUA_UNLOCK();
     return status;
 }
@@ -415 +342 @@
 /**
  * Handle incoming INVITE request.
+ * Called by pjsua_core.c
  */
 pj_bool_t pjsua_call_on_incoming(pjsip_rx_data *rdata)
@@ -424 +352 @@
     unsigned options = 0;
     pjsip_inv_session *inv = NULL;
-    int acc_index;
-    unsigned call_index;
+    int acc_id;
+    pjsua_call *call;
+    int call_id = -1;
     pjmedia_sdp_session *answer;
     pj_status_t status;
@@ -442 +371 @@
     /* Verify that we can handle the request. */
     status = pjsip_inv_verify_request(rdata, &options, NULL, NULL,
-                                      pjsua.endpt, &response);
+                                      pjsua_var.endpt, &response);
     if (status != PJ_SUCCESS) {
 
@@ -453 +382 @@
 
             pjsip_get_response_addr(response->pool, rdata, &res_addr);
-            pjsip_endpt_send_response(pjsua.endpt, &res_addr, response, 
+            pjsip_endpt_send_response(pjsua_var.endpt, &res_addr, response, 
                                       NULL, NULL);
 
@@ -459 +388 @@
 
             /* Respond with 500 (Internal Server Error) */
-            pjsip_endpt_respond_stateless(pjsua.endpt, rdata, 500, NULL,
+            pjsip_endpt_respond_stateless(pjsua_var.endpt, rdata, 500, NULL,
                                           NULL, NULL);
         }
@@ -472 +401 @@
 
     /* Find free call slot. */
-    for (call_index=0; call_index < pjsua.config.max_calls; ++call_index) {
-        if (pjsua.calls[call_index].inv == NULL)
+    for (call_id=0; call_id<(int)pjsua_var.ua_cfg.max_calls; ++call_id) {
+        if (pjsua_var.calls[call_id].inv == NULL)
             break;
     }
 
-    if (call_index == PJSUA_MAX_CALLS) {
-        pjsip_endpt_respond_stateless(pjsua.endpt, rdata, 
+    if (call_id == (int)pjsua_var.ua_cfg.max_calls) {
+        pjsip_endpt_respond_stateless(pjsua_var.endpt, rdata, 
                                       PJSIP_SC_BUSY_HERE, NULL,
                                       NULL, NULL);
@@ -484 +413 @@
     }
 
+    /* Clear call descriptor */
+    reset_call(call_id);
+
+    call = &pjsua_var.calls[call_id];
+
     /* Mark call start time. */
-    pj_gettimeofday(&pjsua.calls[call_index].start_time);
-
-    /* Reset first response time */
-    pjsua.calls[call_index].res_time.sec = 0;
+    pj_gettimeofday(&call->start_time);
 
     /* Get media capability from media endpoint: */
-
-    status = pjmedia_endpt_create_sdp( pjsua.med_endpt, rdata->tp_info.pool, 1,
-                                       &pjsua.calls[call_index].skinfo, 
-                                       &answer );
-    if (status != PJ_SUCCESS) {
-        pjsip_endpt_respond_stateless(pjsua.endpt, rdata, 500, NULL,
+    status = pjmedia_endpt_create_sdp( pjsua_var.med_endpt, 
+                                       rdata->tp_info.pool, 1,
+                                       &call->skinfo, &answer );
+    if (status != PJ_SUCCESS) {
+        pjsip_endpt_respond_stateless(pjsua_var.endpt, rdata, 500, NULL,
                                       NULL, NULL);
-
         return PJ_TRUE;
     }
 
-    /* TODO: 
-     *
+    /* 
      * Get which account is most likely to be associated with this incoming
      * call. We need the account to find which contact URI to put for
      * the call.
      */
-    acc_index = 0;
+    acc_id = pjsua_acc_find_for_incoming(rdata);
 
     /* Create dialog: */
-
     status = pjsip_dlg_create_uas( pjsip_ua_instance(), rdata,
-                                   &pjsua.config.acc_config[acc_index].contact,
+                                   &pjsua_var.acc[acc_id].cfg.contact, 
                                    &dlg);
     if (status != PJ_SUCCESS) {
-        pjsip_endpt_respond_stateless(pjsua.endpt, rdata, 500, NULL,
+        pjsip_endpt_respond_stateless(pjsua_var.endpt, rdata, 500, NULL,
                                       NULL, NULL);
 
@@ -522 +449 @@
     }
 
+    /* Set credentials */
+    if (pjsua_var.acc[acc_id].cred_cnt) {
+        pjsip_auth_clt_set_credentials(&dlg->auth_sess, 
+                                       pjsua_var.acc[acc_id].cred_cnt,
+                                       pjsua_var.acc[acc_id].cred);
+    }
 
     /* Create invite session: */
-
     status = pjsip_inv_create_uas( dlg, rdata, answer, 0, &inv);
     if (status != PJ_SUCCESS) {
-
         pjsip_dlg_respond(dlg, rdata, 500, NULL, NULL, NULL);
         pjsip_dlg_terminate(dlg);
@@ -534 +465 @@
 
 
-    /* Create and attach pjsua data to the dialog: */
-
-    pjsua.calls[call_index].inv = inv;
-
-    dlg->mod_data[pjsua.mod.id] = &pjsua.calls[call_index];
-    inv->mod_data[pjsua.mod.id] = &pjsua.calls[call_index];
+    /* Create and attach pjsua_var data to the dialog: */
+    call->inv = inv;
+
+    dlg->mod_data[pjsua_var.mod.id] = call;
+    inv->mod_data[pjsua_var.mod.id] = call;
 
 
@@ -545 +475 @@
      * If auto-answer flag is set, send 200 straight away, otherwise send 100.
      */
-    
     status = pjsip_inv_initial_answer(inv, rdata, 
-                                      (pjsua.config.auto_answer ? 
-                                      pjsua.config.auto_answer : 100), 
-                                      NULL, NULL, &response);
-    if (status != PJ_SUCCESS) {
-        
-        int st_code;
-
+                                      100, NULL, NULL, &response);
+    if (status != PJ_SUCCESS) {
         pjsua_perror(THIS_FILE, "Unable to send answer to incoming INVITE", 
                      status);
 
-        /* If failed to send 2xx response, there's a good chance that it is
-         * because SDP negotiation has failed.
-         */
-        if (pjsua.config.auto_answer/100 == 2)
-            st_code = PJSIP_SC_UNSUPPORTED_MEDIA_TYPE;
-        else
-            st_code = 500;
-
-        pjsip_dlg_respond(dlg, rdata, st_code, NULL, NULL, NULL);
-        pjsip_inv_terminate(inv, st_code, PJ_FALSE);
+        pjsip_dlg_respond(dlg, rdata, 500, NULL, NULL, NULL);
+        pjsip_inv_terminate(inv, 500, PJ_FALSE);
         return PJ_TRUE;
 
@@ -575 +491 @@
     }
 
-    if (pjsua.config.auto_answer < 200) {
-        PJ_LOG(3,(THIS_FILE,
-                  "\nIncoming call!!\n"
-                  "From: %.*s\n"
-                  "To:   %.*s\n"
-                  "(press 'a' to answer, 'h' to decline)",
-                  (int)dlg->remote.info_str.slen,
-                  dlg->remote.info_str.ptr,
-                  (int)dlg->local.info_str.slen,
-                  dlg->local.info_str.ptr));
-    } else {
-        PJ_LOG(3,(THIS_FILE,
-                  "Call From:%.*s To:%.*s was answered with %d (%s)",
-                  (int)dlg->remote.info_str.slen,
-                  dlg->remote.info_str.ptr,
-                  (int)dlg->local.info_str.slen,
-                  dlg->local.info_str.ptr,
-                  pjsua.config.auto_answer,
-                  pjsip_get_status_text(pjsua.config.auto_answer)->ptr ));
-    }
-
-    ++pjsua.call_cnt;
-
-    /* Schedule timer to refresh. */
-    if (pjsua.config.uas_refresh > 0) {
-        schedule_call_timer( &pjsua.calls[call_index], 
-                             &pjsua.calls[call_index].refresh_tm,
-                             REFRESH_CALL_TIMER,
-                             pjsua.config.uas_refresh);
-    }
-
-    /* Schedule timer to hangup call. */
-    if (pjsua.config.uas_duration > 0) {
-        schedule_call_timer( &pjsua.calls[call_index], 
-                             &pjsua.calls[call_index].hangup_tm,
-                             HANGUP_CALL_TIMER,
-                             pjsua.config.uas_duration);
-    }
+    ++pjsua_var.call_cnt;
+
 
     /* Notify application */
-    if (pjsua.cb.on_incoming_call)
-        pjsua.cb.on_incoming_call(acc_index, call_index, rdata);
-
+    if (pjsua_var.ua_cfg.cb.on_incoming_call)
+        pjsua_var.ua_cfg.cb.on_incoming_call(acc_id, call_id, rdata);
 
     /* This INVITE request has been handled. */
@@ -624 +503 @@
 
 
+
+/*
+ * Check if the specified call has active INVITE session and the INVITE
+ * session has not been disconnected.
+ */
+PJ_DEF(pj_bool_t) pjsua_call_is_active(pjsua_call_id call_id)
+{
+    PJ_ASSERT_RETURN(call_id>=0 && call_id<(int)pjsua_var.ua_cfg.max_calls,
+                     PJ_EINVAL);
+    return pjsua_var.calls[call_id].inv != NULL &&
+           pjsua_var.calls[call_id].inv->state != PJSIP_INV_STATE_DISCONNECTED;
+}
+
+
+/*
+ * Check if call has an active media session.
+ */
+PJ_DEF(pj_bool_t) pjsua_call_has_media(pjsua_call_id call_id)
+{
+    PJ_ASSERT_RETURN(call_id>=0 && call_id<(int)pjsua_var.ua_cfg.max_calls, 
+                     PJ_EINVAL);
+    return pjsua_var.calls[call_id].session != NULL;
+}
+
+
+/*
+ * Get the conference port identification associated with the call.
+ */
+PJ_DEF(pjsua_conf_port_id) pjsua_call_get_conf_port(pjsua_call_id call_id)
+{
+    PJ_ASSERT_RETURN(call_id>=0 && call_id<(int)pjsua_var.ua_cfg.max_calls, 
+                     PJ_EINVAL);
+    return pjsua_var.calls[call_id].conf_slot;
+}
+
+
+/*
+ * Obtain detail information about the specified call.
+ */
+PJ_DEF(pj_status_t) pjsua_call_get_info( pjsua_call_id call_id,
+                                         pjsua_call_info *info)
+{
+    pjsua_call *call;
+
+    PJ_ASSERT_RETURN(call_id>=0 && call_id<(int)pjsua_var.ua_cfg.max_calls,
+                     PJ_EINVAL);
+
+    pj_memset(info, 0, sizeof(*info));
+
+    PJSUA_LOCK();
+
+    call = &pjsua_var.calls[call_id];
+
+    if (call->inv == NULL) {
+        PJSUA_UNLOCK();
+        return PJ_SUCCESS;
+    }
+
+    pjsip_dlg_inc_lock(call->inv->dlg);
+
+
+    /* id and role */
+    info->id = call_id;
+    info->role = call->inv->role;
+
+    /* local info */
+    info->local_info.ptr = info->buf_.local_info;
+    pj_strncpy(&info->local_info, &call->inv->dlg->local.info_str,
+               sizeof(info->buf_.local_info));
+
+    /* local contact */
+    info->local_contact.ptr = info->buf_.local_contact;
+    info->local_contact.slen = pjsip_uri_print(PJSIP_URI_IN_CONTACT_HDR,
+                                               call->inv->dlg->local.contact->uri,
+                                               info->local_contact.ptr,
+                                               sizeof(info->buf_.local_contact));
+
+    /* remote info */
+    info->remote_info.ptr = info->buf_.remote_info;
+    pj_strncpy(&info->remote_info, &call->inv->dlg->remote.info_str,
+               sizeof(info->buf_.remote_info));
+
+    /* remote contact */
+    if (call->inv->dlg->remote.contact) {
+        int len;
+        info->remote_contact.ptr = info->buf_.remote_contact;
+        len = pjsip_uri_print(PJSIP_URI_IN_CONTACT_HDR,
+                              call->inv->dlg->remote.contact->uri,
+                              info->remote_contact.ptr,
+                              sizeof(info->buf_.remote_contact));
+        if (len < 0) len = 0;
+        info->remote_contact.slen = len;
+    } else {
+        info->remote_contact.slen = 0;
+    }
+
+    /* call id */
+    info->call_id.ptr = info->buf_.call_id;
+    pj_strncpy(&info->call_id, &call->inv->dlg->call_id->id,
+               sizeof(info->buf_.call_id));
+
+    /* state, state_text */
+    info->state = call->inv->state;
+    info->state_text = pj_str((char*)pjsip_inv_state_name(info->state));
+
+    /* If call is disconnected, set the last_status from the cause code */
+    if (call->inv->state >= PJSIP_INV_STATE_DISCONNECTED) {
+        /* last_status, last_status_text */
+        info->last_status = call->inv->cause;
+
+        info->last_status_text.ptr = info->buf_.last_status_text;
+        pj_strncpy(&info->last_status_text, &call->inv->cause_text,
+                   sizeof(info->buf_.last_status_text));
+    } else {
+        /* last_status, last_status_text */
+        info->last_status = call->last_code;
+
+        info->last_status_text.ptr = info->buf_.last_status_text;
+        pj_strncpy(&info->last_status_text, &call->last_text,
+                   sizeof(info->buf_.last_status_text));
+    }
+    
+    /* media status and dir */
+    info->media_status = call->media_st;
+    info->media_dir = call->media_dir;
+
+
+    /* conference slot number */
+    info->conf_slot = call->conf_slot;
+
+    /* calculate duration */
+    if (info->state >= PJSIP_INV_STATE_DISCONNECTED) {
+
+        info->total_duration = call->dis_time;
+        PJ_TIME_VAL_SUB(info->total_duration, call->start_time);
+
+        if (call->conn_time.sec) {
+            info->connect_duration = call->dis_time;
+            PJ_TIME_VAL_SUB(info->connect_duration, call->conn_time);
+        }
+
+    } else if (info->state == PJSIP_INV_STATE_CONFIRMED) {
+
+        pj_gettimeofday(&info->total_duration);
+        PJ_TIME_VAL_SUB(info->total_duration, call->start_time);
+
+        pj_gettimeofday(&info->connect_duration);
+        PJ_TIME_VAL_SUB(info->connect_duration, call->conn_time);
+
+    } else {
+        pj_gettimeofday(&info->total_duration);
+        PJ_TIME_VAL_SUB(info->total_duration, call->start_time);
+    }
+
+    pjsip_dlg_dec_lock(call->inv->dlg);
+    PJSUA_UNLOCK();
+
+    return PJ_SUCCESS;
+}
+
+
+/*
+ * Attach application specific data to the call.
+ */
+PJ_DEF(pj_status_t) pjsua_call_set_user_data( pjsua_call_id call_id,
+                                              void *user_data)
+{
+    PJ_ASSERT_RETURN(call_id>=0 && call_id<(int)pjsua_var.ua_cfg.max_calls,
+                     PJ_EINVAL);
+    pjsua_var.calls[call_id].user_data = user_data;
+
+    return PJ_SUCCESS;
+}
+
+
+/*
+ * Get user data attached to the call.
+ */
+PJ_DEF(void*) pjsua_call_get_user_data(pjsua_call_id call_id)
+{
+    PJ_ASSERT_RETURN(call_id>=0 && call_id<(int)pjsua_var.ua_cfg.max_calls,
+                     NULL);
+    return pjsua_var.calls[call_id].user_data;
+}
+
+
+/*
+ * Send response to incoming INVITE request.
+ */
+PJ_DEF(pj_status_t) pjsua_call_answer( pjsua_call_id call_id, 
+                                       unsigned code,
+                                       const pj_str_t *reason,
+                                       const pjsua_msg_data *msg_data)
+{
+    pjsua_call *call;
+    pjsip_tx_data *tdata;
+    pj_status_t status;
+
+    PJ_ASSERT_RETURN(call_id>=0 && call_id<(int)pjsua_var.ua_cfg.max_calls,
+                     PJ_EINVAL);
+
+    PJSUA_LOCK();
+
+    call = &pjsua_var.calls[call_id];
+
+    if (call->inv == NULL) {
+        PJ_LOG(3,(THIS_FILE, "Call %d already disconnected", call_id));
+        PJSUA_UNLOCK();
+        return PJSIP_ESESSIONTERMINATED;
+    }
+
+    /* Create response message */
+    status = pjsip_inv_answer(call->inv, code, reason, NULL, &tdata);
+    if (status != PJ_SUCCESS) {
+        pjsua_perror(THIS_FILE, "Error creating response", 
+                     status);
+        PJSUA_UNLOCK();
+        return status;
+    }
+
+    /* Add additional headers etc */
+    pjsua_process_msg_data( tdata, msg_data);
+
+    /* Send the message */
+    status = pjsip_inv_send_msg(call->inv, tdata);
+    if (status != PJ_SUCCESS)
+        pjsua_perror(THIS_FILE, "Error sending response", 
+                     status);
+
+    PJSUA_UNLOCK();
+
+    return status;
+}
+
+
+/*
+ * Hangup call by using method that is appropriate according to the
+ * call state.
+ */
+PJ_DEF(pj_status_t) pjsua_call_hangup(pjsua_call_id call_id,
+                                      unsigned code,
+                                      const pj_str_t *reason,
+                                      const pjsua_msg_data *msg_data)
+{
+    pjsua_call *call;
+    pj_status_t status;
+    pjsip_tx_data *tdata;
+
+
+    PJ_ASSERT_RETURN(call_id>=0 && call_id<(int)pjsua_var.ua_cfg.max_calls,
+                     PJ_EINVAL);
+
+    PJSUA_LOCK();
+
+    call = &pjsua_var.calls[call_id];
+
+    if (!call->inv) {
+        PJ_LOG(3,(THIS_FILE,"Call has been disconnected"));
+        PJSUA_UNLOCK();
+        return PJ_EINVAL;
+    }
+
+    if (code==0) {
+        if (call->inv->state == PJSIP_INV_STATE_CONFIRMED)
+            code = PJSIP_SC_OK;
+        else if (call->inv->role == PJSIP_ROLE_UAS)
+            code = PJSIP_SC_DECLINE;
+        else
+            code = PJSIP_SC_REQUEST_TERMINATED;
+    }
+
+    status = pjsip_inv_end_session(call->inv, code, reason, &tdata);
+    if (status != PJ_SUCCESS) {
+        pjsua_perror(THIS_FILE, 
+                     "Failed to create end session message", 
+                     status);
+        PJSUA_UNLOCK();
+        return status;
+    }
+
+    /* pjsip_inv_end_session may return PJ_SUCCESS with NULL 
+     * as p_tdata when INVITE transaction has not been answered
+     * with any provisional responses.
+     */
+    if (tdata == NULL) {
+        PJSUA_UNLOCK();
+        return PJ_SUCCESS;
+    }
+
+    /* Add additional headers etc */
+    pjsua_process_msg_data( tdata, msg_data);
+
+    /* Send the message */
+    status = pjsip_inv_send_msg(call->inv, tdata);
+    if (status != PJ_SUCCESS) {
+        pjsua_perror(THIS_FILE, 
+                     "Failed to send end session message", 
+                     status);
+        PJSUA_UNLOCK();
+        return status;
+    }
+
+    PJSUA_UNLOCK();
+
+    return PJ_SUCCESS;
+}
+
+
+/*
+ * Put the specified call on hold.
+ */
+PJ_DEF(pj_status_t) pjsua_call_set_hold(pjsua_call_id call_id,
+                                        const pjsua_msg_data *msg_data)
+{
+    pjmedia_sdp_session *sdp;
+    pjsua_call *call;
+    pjsip_tx_data *tdata;
+    pj_status_t status;
+
+    PJ_ASSERT_RETURN(call_id>=0 && call_id<(int)pjsua_var.ua_cfg.max_calls,
+                     PJ_EINVAL);
+
+    PJSUA_LOCK();
+
+    call = &pjsua_var.calls[call_id];
+    
+    if (!call->inv) {
+        PJ_LOG(3,(THIS_FILE,"Call has been disconnected"));
+        PJSUA_UNLOCK();
+        return PJSIP_ESESSIONTERMINATED;
+    }
+
+    if (call->inv->state != PJSIP_INV_STATE_CONFIRMED) {
+        PJ_LOG(3,(THIS_FILE, "Can not hold call that is not confirmed"));
+        PJSUA_UNLOCK();
+        return PJSIP_ESESSIONSTATE;
+    }
+
+    status = create_inactive_sdp(call, &sdp);
+    if (status != PJ_SUCCESS) {
+        PJSUA_UNLOCK();
+        return status;
+    }
+
+    /* Create re-INVITE with new offer */
+    status = pjsip_inv_reinvite( call->inv, NULL, sdp, &tdata);
+    if (status != PJ_SUCCESS) {
+        pjsua_perror(THIS_FILE, "Unable to create re-INVITE", status);
+        PJSUA_UNLOCK();
+        return status;
+    }
+
+    /* Add additional headers etc */
+    pjsua_process_msg_data( tdata, msg_data);
+
+    /* Send the request */
+    status = pjsip_inv_send_msg( call->inv, tdata);
+    if (status != PJ_SUCCESS) {
+        pjsua_perror(THIS_FILE, "Unable to send re-INVITE", status);
+        PJSUA_UNLOCK();
+        return status;
+    }
+
+    PJSUA_UNLOCK();
+
+    return PJ_SUCCESS;
+}
+
+
+/*
+ * Send re-INVITE (to release hold).
+ */
+PJ_DEF(pj_status_t) pjsua_call_reinvite( pjsua_call_id call_id,
+                                         pj_bool_t unhold,
+                                         const pjsua_msg_data *msg_data)
+{
+    pjmedia_sdp_session *sdp;
+    pjsip_tx_data *tdata;
+    pjsua_call *call;
+    pj_status_t status;
+
+
+    PJ_ASSERT_RETURN(call_id>=0 && call_id<(int)pjsua_var.ua_cfg.max_calls,
+                     PJ_EINVAL);
+
+    PJSUA_LOCK();
+
+    call = &pjsua_var.calls[call_id];
+
+    if (!call->inv) {
+        PJ_LOG(3,(THIS_FILE,"Call has been disconnected"));
+        PJSUA_UNLOCK();
+        return PJSIP_ESESSIONTERMINATED;
+    }
+
+
+    if (call->inv->state != PJSIP_INV_STATE_CONFIRMED) {
+        PJ_LOG(3,(THIS_FILE, "Can not re-INVITE call that is not confirmed"));
+        PJSUA_UNLOCK();
+        return PJSIP_ESESSIONSTATE;
+    }
+
+    /* Create SDP */
+    status = pjmedia_endpt_create_sdp( pjsua_var.med_endpt, call->inv->pool, 
+                                       1, &call->skinfo, &sdp);
+    if (status != PJ_SUCCESS) {
+        pjsua_perror(THIS_FILE, "Unable to get SDP from media endpoint", 
+                     status);
+        PJSUA_UNLOCK();
+        return status;
+    }
+
+    /* Create re-INVITE with new offer */
+    status = pjsip_inv_reinvite( call->inv, NULL, sdp, &tdata);
+    if (status != PJ_SUCCESS) {
+        pjsua_perror(THIS_FILE, "Unable to create re-INVITE", status);
+        PJSUA_UNLOCK();
+        return status;
+    }
+
+    /* Add additional headers etc */
+    pjsua_process_msg_data( tdata, msg_data);
+
+    /* Send the request */
+    status = pjsip_inv_send_msg( call->inv, tdata);
+    if (status != PJ_SUCCESS) {
+        pjsua_perror(THIS_FILE, "Unable to send re-INVITE", status);
+        PJSUA_UNLOCK();
+        return status;
+    }
+
+    PJSUA_UNLOCK();
+
+    return PJ_SUCCESS;
+}
+
+
+/*
+ * Initiate call transfer to the specified address.
+ */
+PJ_DEF(pj_status_t) pjsua_call_xfer( pjsua_call_id call_id, 
+                                     const pj_str_t *dest,
+                                     const pjsua_msg_data *msg_data)
+{
+    pjsip_evsub *sub;
+    pjsip_tx_data *tdata;
+    pjsua_call *call;
+    pj_status_t status;
+
+
+    PJ_ASSERT_RETURN(call_id>=0 && call_id<(int)pjsua_var.ua_cfg.max_calls,
+                     PJ_EINVAL);
+    
+    PJSUA_LOCK();
+
+    call = &pjsua_var.calls[call_id];
+
+    if (!call->inv) {
+        PJ_LOG(3,(THIS_FILE,"Call has been disconnected"));
+        PJSUA_UNLOCK();
+        return PJSIP_ESESSIONTERMINATED;
+    }
+   
+    /* Create xfer client subscription.
+     * We're not interested in knowing the transfer result, so we
+     * put NULL as the callback.
+     */
+    status = pjsip_xfer_create_uac(call->inv->dlg, NULL, &sub);
+    if (status != PJ_SUCCESS) {
+        pjsua_perror(THIS_FILE, "Unable to create xfer", status);
+        PJSUA_UNLOCK();
+        return status;
+    }
+
+    /*
+     * Create REFER request.
+     */
+    status = pjsip_xfer_initiate(sub, dest, &tdata);
+    if (status != PJ_SUCCESS) {
+        pjsua_perror(THIS_FILE, "Unable to create REFER request", status);
+        PJSUA_UNLOCK();
+        return status;
+    }
+
+    /* Add additional headers etc */
+    pjsua_process_msg_data( tdata, msg_data);
+
+    /* Send. */
+    status = pjsip_xfer_send_request(sub, tdata);
+    if (status != PJ_SUCCESS) {
+        pjsua_perror(THIS_FILE, "Unable to send REFER request", status);
+        PJSUA_UNLOCK();
+        return status;
+    }
+
+    /* For simplicity (that's what this program is intended to be!), 
+     * leave the original invite session as it is. More advanced application
+     * may want to hold the INVITE, or terminate the invite, or whatever.
+     */
+
+    PJSUA_UNLOCK();
+
+    return PJ_SUCCESS;
+
+}
+
+
+/*
+ * Send DTMF digits to remote using RFC 2833 payload formats.
+ */
+PJ_DEF(pj_status_t) pjsua_call_dial_dtmf( pjsua_call_id call_id, 
+                                          const pj_str_t *digits)
+{
+    pjsua_call *call;
+    pj_status_t status;
+
+    PJ_ASSERT_RETURN(call_id>=0 && call_id<(int)pjsua_var.ua_cfg.max_calls,
+                     PJ_EINVAL);
+    
+    PJSUA_LOCK();
+
+    call = &pjsua_var.calls[call_id];
+
+    if (!call->session) {
+        PJ_LOG(3,(THIS_FILE, "Media is not established yet!"));
+        PJSUA_UNLOCK();
+        return PJ_EINVALIDOP;
+    }
+
+    status = pjmedia_session_dial_dtmf( call->session, 0, digits);
+
+    PJSUA_UNLOCK();
+
+    return status;
+}
+
+
+/**
+ * Send instant messaging inside INVITE session.
+ */
+PJ_DEF(pj_status_t) pjsua_call_send_im( pjsua_call_id call_id, 
+                                        const pj_str_t *mime_type,
+                                        const pj_str_t *content,
+                                        const pjsua_msg_data *msg_data,
+                                        void *user_data)
+{
+    pjsua_call *call;
+    const pj_str_t mime_text_plain = pj_str("text/plain");
+    pjsip_media_type ctype;
+    pjsua_im_data *im_data;
+    pjsip_tx_data *tdata;
+    pj_status_t status;
+
+
+    PJ_ASSERT_RETURN(call_id>=0 && call_id<(int)pjsua_var.ua_cfg.max_calls,
+                     PJ_EINVAL);
+
+    PJSUA_LOCK();
+
+    call = &pjsua_var.calls[call_id];
+
+    if (!call->inv) {
+        PJ_LOG(3,(THIS_FILE,"Call has been disconnected"));
+        PJSUA_UNLOCK();
+        return PJSIP_ESESSIONTERMINATED;
+    }
+
+    /* Lock dialog. */
+    pjsip_dlg_inc_lock(call->inv->dlg);
+
+    /* Set default media type if none is specified */
+    if (mime_type == NULL) {
+        mime_type = &mime_text_plain;
+    }
+
+    /* Create request message. */
+    status = pjsip_dlg_create_request( call->inv->dlg, &pjsip_message_method,
+                                       -1, &tdata);
+    if (status != PJ_SUCCESS) {
+        pjsua_perror(THIS_FILE, "Unable to create MESSAGE request", status);
+        goto on_return;
+    }
+
+    /* Add accept header. */
+    pjsip_msg_add_hdr( tdata->msg, 
+                       (pjsip_hdr*)pjsua_im_create_accept(tdata->pool));
+
+    /* Parse MIME type */
+    pjsua_parse_media_type(tdata->pool, mime_type, &ctype);
+
+    /* Create "text/plain" message body. */
+    tdata->msg->body = pjsip_msg_body_create( tdata->pool, &ctype.type,
+                                              &ctype.subtype, content);
+    if (tdata->msg->body == NULL) {
+        pjsua_perror(THIS_FILE, "Unable to create msg body", PJ_ENOMEM);
+        pjsip_tx_data_dec_ref(tdata);
+        goto on_return;
+    }
+
+    /* Add additional headers etc */
+    pjsua_process_msg_data( tdata, msg_data);
+
+    /* Create IM data and attach to the request. */
+    im_data = pj_pool_zalloc(tdata->pool, sizeof(*im_data));
+    im_data->acc_id = call->acc_id;
+    im_data->call_id = call_id;
+    im_data->to = call->inv->dlg->remote.info_str;
+    pj_strdup_with_null(tdata->pool, &im_data->body, content);
+    im_data->user_data = user_data;
+
+
+    /* Send the request. */
+    status = pjsip_dlg_send_request( call->inv->dlg, tdata, 
+                                     pjsua_var.mod.id, im_data);
+    if (status != PJ_SUCCESS) {
+        pjsua_perror(THIS_FILE, "Unable to send MESSAGE request", status);
+        goto on_return;
+    }
+
+on_return:
+    pjsip_dlg_dec_lock(call->inv->dlg);
+    PJSUA_UNLOCK();
+    return status;
+}
+
+
+/*
+ * Send IM typing indication inside INVITE session.
+ */
+PJ_DEF(pj_status_t) pjsua_call_send_typing_ind( pjsua_call_id call_id, 
+                                                pj_bool_t is_typing,
+                                                const pjsua_msg_data*msg_data)
+{
+    pjsua_call *call;
+    pjsip_tx_data *tdata;
+    pj_status_t status;
+
+
+    PJ_ASSERT_RETURN(call_id>=0 && call_id<(int)pjsua_var.ua_cfg.max_calls,
+                     PJ_EINVAL);
+
+    PJSUA_LOCK();
+
+    call = &pjsua_var.calls[call_id];
+
+    if (!call->inv) {
+        PJ_LOG(3,(THIS_FILE,"Call has been disconnected"));
+        PJSUA_UNLOCK();
+        return PJSIP_ESESSIONTERMINATED;
+    }
+
+    /* Lock dialog. */
+    pjsip_dlg_inc_lock(call->inv->dlg);
+    
+    /* Create request message. */
+    status = pjsip_dlg_create_request( call->inv->dlg, &pjsip_message_method,
+                                       -1, &tdata);
+    if (status != PJ_SUCCESS) {
+        pjsua_perror(THIS_FILE, "Unable to create MESSAGE request", status);
+        goto on_return;
+    }
+
+    /* Create "application/im-iscomposing+xml" msg body. */
+    tdata->msg->body = pjsip_iscomposing_create_body(tdata->pool, is_typing,
+                                                     NULL, NULL, -1);
+
+    /* Add additional headers etc */
+    pjsua_process_msg_data( tdata, msg_data);
+
+    /* Send the request. */
+    status = pjsip_dlg_send_request( call->inv->dlg, tdata, -1, NULL);
+    if (status != PJ_SUCCESS) {
+        pjsua_perror(THIS_FILE, "Unable to send MESSAGE request", status);
+        goto on_return;
+    }
+
+on_return:
+    pjsip_dlg_dec_lock(call->inv->dlg);
+    PJSUA_UNLOCK();
+    return status;
+}
+
+
+/*
+ * Terminate all calls.
+ */
+PJ_DEF(void) pjsua_call_hangup_all(void)
+{
+    unsigned i;
+
+    PJSUA_LOCK();
+
+    for (i=0; i<pjsua_var.ua_cfg.max_calls; ++i) {
+        if (pjsua_var.calls[i].inv)
+            pjsua_call_hangup(i, 0, NULL, NULL);
+    }
+
+    PJSUA_UNLOCK();
+}
+
+
+static const char *good_number(char *buf, pj_int32_t val)
+{
+    if (val < 1000) {
+        pj_ansi_sprintf(buf, "%d", val);
+    } else if (val < 1000000) {
+        pj_ansi_sprintf(buf, "%d.%dK", 
+                        val / 1000,
+                        (val % 1000) / 100);
+    } else {
+        pj_ansi_sprintf(buf, "%d.%02dM", 
+                        val / 1000000,
+                        (val % 1000000) / 10000);
+    }
+
+    return buf;
+}
+
+
+/* Dump media session */
+static void dump_media_session(const char *indent, 
+                               char *buf, unsigned maxlen,
+                               pjmedia_session *session)
+{
+    unsigned i;
+    char *p = buf, *end = buf+maxlen;
+    int len;
+    pjmedia_session_info info;
+
+    pjmedia_session_get_info(session, &info);
+
+    for (i=0; i<info.stream_cnt; ++i) {
+        pjmedia_rtcp_stat stat;
+        const char *rem_addr;
+        int rem_port;
+        const char *dir;
+        char last_update[40];
+        char packets[16], bytes[16], ipbytes[16];
+        pj_time_val now;
+
+        pjmedia_session_get_stream_stat(session, i, &stat);
+        rem_addr = pj_inet_ntoa(info.stream_info[i].rem_addr.sin_addr);
+        rem_port = pj_ntohs(info.stream_info[i].rem_addr.sin_port);
+
+        if (info.stream_info[i].dir == PJMEDIA_DIR_ENCODING)
+            dir = "sendonly";
+        else if (info.stream_info[i].dir == PJMEDIA_DIR_DECODING)
+            dir = "recvonly";
+        else if (info.stream_info[i].dir == PJMEDIA_DIR_ENCODING_DECODING)
+            dir = "sendrecv";
+        else
+            dir = "inactive";
+
+        
+        len = pj_ansi_snprintf(buf, end-p, 
+                  "%s  #%d %.*s @%dKHz, %s, peer=%s:%d",
+                  indent, i,
+                  info.stream_info[i].fmt.encoding_name.slen,
+                  info.stream_info[i].fmt.encoding_name.ptr,
+                  info.stream_info[i].fmt.clock_rate / 1000,
+                  dir,
+                  rem_addr, rem_port);
+        if (len < 1 || len > end-p) {
+            *p = '\0';
+            return;
+        }
+
+        p += len;
+        *p++ = '\n';
+        *p = '\0';
+
+        if (stat.rx.update_cnt == 0)
+            strcpy(last_update, "never");
+        else {
+            pj_gettimeofday(&now);
+            PJ_TIME_VAL_SUB(now, stat.rx.update);
+            sprintf(last_update, "%02ldh:%02ldm:%02ld.%03lds ago",
+                    now.sec / 3600,
+                    (now.sec % 3600) / 60,
+                    now.sec % 60,
+                    now.msec);
+        }
+
+        len = pj_ansi_snprintf(p, end-p,
+               "%s     RX pt=%d, stat last update: %s\n"
+               "%s        total %spkt %sB (%sB +IP hdr)\n"
+               "%s        pkt loss=%d (%3.1f%%), dup=%d (%3.1f%%), reorder=%d (%3.1f%%)\n"
+               "%s              (msec)    min     avg     max     last\n"
+               "%s        loss period: %7.3f %7.3f %7.3f %7.3f\n"
+               "%s        jitter     : %7.3f %7.3f %7.3f %7.3f%s",
+               indent, info.stream_info[i].fmt.pt,
+               last_update,
+               indent,
+               good_number(packets, stat.rx.pkt),
+               good_number(bytes, stat.rx.bytes),
+               good_number(ipbytes, stat.rx.bytes + stat.rx.pkt * 32),
+               indent,
+               stat.rx.loss,
+               stat.rx.loss * 100.0 / stat.rx.pkt,
+               stat.rx.dup, 
+               stat.rx.dup * 100.0 / stat.rx.pkt,
+               stat.rx.reorder, 
+               stat.rx.reorder * 100.0 / stat.rx.pkt,
+               indent, indent,
+               stat.rx.loss_period.min / 1000.0, 
+               stat.rx.loss_period.avg / 1000.0, 
+               stat.rx.loss_period.max / 1000.0,
+               stat.rx.loss_period.last / 1000.0,
+               indent,
+               stat.rx.jitter.min / 1000.0,
+               stat.rx.jitter.avg / 1000.0,
+               stat.rx.jitter.max / 1000.0,
+               stat.rx.jitter.last / 1000.0,
+               ""
+               );
+
+        if (len < 1 || len > end-p) {
+            *p = '\0';
+            return;
+        }
+
+        p += len;
+        *p++ = '\n';
+        *p = '\0';
+        
+        if (stat.tx.update_cnt == 0)
+            strcpy(last_update, "never");
+        else {
+            pj_gettimeofday(&now);
+            PJ_TIME_VAL_SUB(now, stat.tx.update);
+            sprintf(last_update, "%02ldh:%02ldm:%02ld.%03lds ago",
+                    now.sec / 3600,
+                    (now.sec % 3600) / 60,
+                    now.sec % 60,
+                    now.msec);
+        }
+
+        len = pj_ansi_snprintf(p, end-p,
+               "%s     TX pt=%d, ptime=%dms, stat last update: %s\n"
+               "%s        total %spkt %sB (%sB +IP hdr)\n"
+               "%s        pkt loss=%d (%3.1f%%), dup=%d (%3.1f%%), reorder=%d (%3.1f%%)\n"
+               "%s              (msec)    min     avg     max     last\n"
+               "%s        loss period: %7.3f %7.3f %7.3f %7.3f\n"
+               "%s        jitter     : %7.3f %7.3f %7.3f %7.3f%s",
+               indent,
+               info.stream_info[i].tx_pt,
+               info.stream_info[i].param->info.frm_ptime *
+                info.stream_info[i].param->setting.frm_per_pkt,
+               last_update,
+
+               indent,
+               good_number(packets, stat.tx.pkt),
+               good_number(bytes, stat.tx.bytes),
+               good_number(ipbytes, stat.tx.bytes + stat.tx.pkt * 32),
+
+               indent,
+               stat.tx.loss,
+               stat.tx.loss * 100.0 / stat.tx.pkt,
+               stat.tx.dup, 
+               stat.tx.dup * 100.0 / stat.tx.pkt,
+               stat.tx.reorder, 
+               stat.tx.reorder * 100.0 / stat.tx.pkt,
+
+               indent, indent,
+               stat.tx.loss_period.min / 1000.0, 
+               stat.tx.loss_period.avg / 1000.0, 
+               stat.tx.loss_period.max / 1000.0,
+               stat.tx.loss_period.last / 1000.0,
+               indent,
+               stat.tx.jitter.min / 1000.0,
+               stat.tx.jitter.avg / 1000.0,
+               stat.tx.jitter.max / 1000.0,
+               stat.tx.jitter.last / 1000.0,
+               ""
+               );
+
+        if (len < 1 || len > end-p) {
+            *p = '\0';
+            return;
+        }
+
+        p += len;
+        *p++ = '\n';
+        *p = '\0';
+
+        len = pj_ansi_snprintf(p, end-p,
+               "%s    RTT msec       : %7.3f %7.3f %7.3f %7.3f", 
+               indent,
+               stat.rtt.min / 1000.0,
+               stat.rtt.avg / 1000.0,
+               stat.rtt.max / 1000.0,
+               stat.rtt.last / 1000.0
+               );
+        if (len < 1 || len > end-p) {
+            *p = '\0';
+            return;
+        }
+
+        p += len;
+        *p++ = '\n';
+        *p = '\0';
+    }
+}
+
+
+/* Print call info */
+static void print_call(const char *title,
+                       int call_id, 
+                       char *buf, pj_size_t size)
+{
+    int len;
+    pjsip_inv_session *inv = pjsua_var.calls[call_id].inv;
+    pjsip_dialog *dlg = inv->dlg;
+    char userinfo[128];
+
+    /* Dump invite sesion info. */
+
+    len = pjsip_hdr_print_on(dlg->remote.info, userinfo, sizeof(userinfo));
+    if (len < 1)
+        pj_ansi_strcpy(userinfo, "<--uri too long-->");
+    else
+        userinfo[len] = '\0';
+    
+    len = pj_ansi_snprintf(buf, size, "%s[%s] %s",
+                           title,
+                           pjsip_inv_state_name(inv->state),
+                           userinfo);
+    if (len < 1 || len >= (int)size) {
+        pj_ansi_strcpy(buf, "<--uri too long-->");
+        len = 18;
+    } else
+        buf[len] = '\0';
+}
+
+
+/*
+ * Dump call and media statistics to string.
+ */
+PJ_DEF(pj_status_t) pjsua_call_dump( pjsua_call_id call_id, 
+                                     pj_bool_t with_media, 
+                                     char *buffer, 
+                                     unsigned maxlen,
+                                     const char *indent)
+{
+    pjsua_call *call;
+    pj_time_val duration, res_delay, con_delay;
+    char tmp[128];
+    char *p, *end;
+    int len;
+
+    PJ_ASSERT_RETURN(call_id>=0 && call_id<(int)pjsua_var.ua_cfg.max_calls,
+                     PJ_EINVAL);
+
+    PJSUA_LOCK();
+
+    call = &pjsua_var.calls[call_id];
+
+    *buffer = '\0';
+    p = buffer;
+    end = buffer + maxlen;
+    len = 0;
+
+    if (call->inv == NULL) {
+        PJSUA_UNLOCK();
+        return PJ_EINVALIDOP;
+    }
+
+    print_call(indent, call_id, tmp, sizeof(tmp));
+    
+    len = pj_ansi_strlen(tmp);
+    pj_ansi_strcpy(buffer, tmp);
+
+    p += len;
+    *p++ = '\r';
+    *p++ = '\n';
+
+    /* Calculate call duration */
+    if (call->inv->state >= PJSIP_INV_STATE_CONFIRMED) {
+        pj_gettimeofday(&duration);
+        PJ_TIME_VAL_SUB(duration, call->conn_time);
+        con_delay = call->conn_time;
+        PJ_TIME_VAL_SUB(con_delay, call->start_time);
+    } else {
+        duration.sec = duration.msec = 0;
+        con_delay.sec = con_delay.msec = 0;
+    }
+
+    /* Calculate first response delay */
+    if (call->inv->state >= PJSIP_INV_STATE_EARLY) {
+        res_delay = call->res_time;
+        PJ_TIME_VAL_SUB(res_delay, call->start_time);
+    } else {
+        res_delay.sec = res_delay.msec = 0;
+    }
+
+    /* Print duration */
+    len = pj_ansi_snprintf(p, end-p, 
+                           "%s  Call time: %02dh:%02dm:%02ds, "
+                           "1st res in %d ms, conn in %dms",
+                           indent,
+                           (duration.sec / 3600),
+                           ((duration.sec % 3600)/60),
+                           (duration.sec % 60),
+                           PJ_TIME_VAL_MSEC(res_delay), 
+                           PJ_TIME_VAL_MSEC(con_delay));
+    
+    if (len > 0 && len < end-p) {
+        p += len;
+        *p++ = '\n';
+        *p = '\0';
+    }
+
+    /* Dump session statistics */
+    if (with_media && call->session)
+        dump_media_session(indent, p, end-p, call->session);
+
+    PJSUA_UNLOCK();
+
+    return PJ_SUCCESS;
+}
+
+
+/*
+ * Destroy the call's media
+ */
+static pj_status_t call_destroy_media(int call_id)
+{
+    pjsua_call *call = &pjsua_var.calls[call_id];
+
+    if (call->conf_slot != PJSUA_INVALID_ID) {
+        pjmedia_conf_remove_port(pjsua_var.mconf, call->conf_slot);
+        call->conf_slot = PJSUA_INVALID_ID;
+    }
+
+    if (call->session) {
+        /* Destroy session (this will also close RTP/RTCP sockets). */
+        pjmedia_session_destroy(call->session);
+        call->session = NULL;
+
+        PJ_LOG(4,(THIS_FILE, "Media session for call %d is destroyed", 
+                             call_id));
+
+    }
+
+    call->media_st = PJSUA_CALL_MEDIA_NONE;
+
+    return PJ_SUCCESS;
+}
+
+
 /*
  * This callback receives notification from invite session when the
@@ -631 +1560 @@
                                         pjsip_event *e)
 {
-    pjsua_call *call = inv->dlg->mod_data[pjsua.mod.id];
-
-    if (!call)
+    pjsua_call *call;
+
+    PJSUA_LOCK();
+
+    call = inv->dlg->mod_data[pjsua_var.mod.id];
+
+    if (!call) {
+        PJSUA_UNLOCK();
         return;
+    }
+
 
     /* Get call times */
@@ -643 +1579 @@
                 pj_gettimeofday(&call->res_time);
             call->last_code = e->body.tsx_state.tsx->status_code;
+            pj_strncpy(&call->last_text, 
+                       &e->body.tsx_state.tsx->status_text,
+                       sizeof(call->last_text_buf_));
             break;
         case PJSIP_INV_STATE_CONFIRMED:
@@ -651 +1590 @@
             if (e->body.tsx_state.tsx->status_code > call->last_code) {
                 call->last_code = e->body.tsx_state.tsx->status_code;
+                pj_strncpy(&call->last_text, 
+                           &e->body.tsx_state.tsx->status_text,
+                           sizeof(call->last_text_buf_));
             }
             break;
         default:
             call->last_code = e->body.tsx_state.tsx->status_code;
+            pj_strncpy(&call->last_text, 
+                       &e->body.tsx_state.tsx->status_text,
+                       sizeof(call->last_text_buf_));
             break;
     }
@@ -717 +1662 @@
 
 
-    if (pjsua.cb.on_call_state)
-        (*pjsua.cb.on_call_state)(call->index, e);
+    if (pjsua_var.ua_cfg.cb.on_call_state)
+        (*pjsua_var.ua_cfg.cb.on_call_state)(call->index, e);
 
     /* call->inv may be NULL now */
@@ -730 +1675 @@
             call_destroy_media(call->index);
 
-        /* Remove timers. */
-        schedule_call_timer(call, &call->refresh_tm, REFRESH_CALL_TIMER, 0);
-        schedule_call_timer(call, &call->hangup_tm, HANGUP_CALL_TIMER, 0);
-
         /* Free call */
         call->inv = NULL;
-        --pjsua.call_cnt;
-    }
-}
-
-
-/*
- * Callback called by event framework when the xfer subscription state
- * has changed.
- */
-static void xfer_on_evsub_state( pjsip_evsub *sub, pjsip_event *event)
-{
-    
-    PJ_UNUSED_ARG(event);
-
-    /*
-     * We're only interested when subscription is terminated, to 
-     * clear the xfer_sub member of the inv_data.
-     */
-    if (pjsip_evsub_get_state(sub) == PJSIP_EVSUB_STATE_TERMINATED) {
-        pjsua_call *call;
-
-        call = pjsip_evsub_get_mod_data(sub, pjsua.mod.id);
-        if (!call)
-            return;
-
-        pjsip_evsub_set_mod_data(sub, pjsua.mod.id, NULL);
-        call->xfer_sub = NULL;
-
-        PJ_LOG(3,(THIS_FILE, "Xfer subscription terminated"));
-    }
-}
-
-
-/*
- * Follow transfer (REFER) request.
- */
-static void on_call_transfered( pjsip_inv_session *inv,
-                                pjsip_rx_data *rdata )
-{
-    pj_status_t status;
-    pjsip_tx_data *tdata;
-    pjsua_call *existing_call;
-    int new_call;
-    const pj_str_t str_refer_to = { "Refer-To", 8};
-    pjsip_generic_string_hdr *refer_to;
-    char *uri;
-    pj_str_t tmp;
-    struct pjsip_evsub_user xfer_cb;
-    pjsip_status_code code;
-    pjsip_evsub *sub;
-
-    existing_call = inv->dlg->mod_data[pjsua.mod.id];
-
-    /* Find the Refer-To header */
-    refer_to = (pjsip_generic_string_hdr*)
-        pjsip_msg_find_hdr_by_name(rdata->msg_info.msg, &str_refer_to, NULL);
-
-    if (refer_to == NULL) {
-        /* Invalid Request.
-         * No Refer-To header!
-         */
-        PJ_LOG(4,(THIS_FILE, "Received REFER without Refer-To header!"));
-        pjsip_dlg_respond( inv->dlg, rdata, 400, NULL, NULL, NULL);
-        return;
-    }
-
-    /* Notify callback */
-    code = PJSIP_SC_OK;
-    if (pjsua.cb.on_call_transfered)
-        (*pjsua.cb.on_call_transfered)(existing_call->index,
-                                       &refer_to->hvalue, &code);
-
-    if (code < 200)
-        code = 200;
-    if (code >= 300) {
-        /* Application rejects call transfer request */
-        pjsip_dlg_respond( inv->dlg, rdata, code, NULL, NULL, NULL);
-        return;
-    }
-
-    PJ_LOG(3,(THIS_FILE, "Call to %.*s is being transfered to %.*s",
-              (int)inv->dlg->remote.info_str.slen,
-              inv->dlg->remote.info_str.ptr,
-              (int)refer_to->hvalue.slen, 
-              refer_to->hvalue.ptr));
-
-    /* Init callback */
-    pj_memset(&xfer_cb, 0, sizeof(xfer_cb));
-    xfer_cb.on_evsub_state = &xfer_on_evsub_state;
-
-    /* Create transferee event subscription */
-    status = pjsip_xfer_create_uas( inv->dlg, &xfer_cb, rdata, &sub);
-    if (status != PJ_SUCCESS) {
-        pjsua_perror(THIS_FILE, "Unable to create xfer uas", status);
-        pjsip_dlg_respond( inv->dlg, rdata, 500, NULL, NULL, NULL);
-        return;
-    }
-
-    /* Accept the REFER request, send 200 (OK). */
-    pjsip_xfer_accept(sub, rdata, code, NULL);
-
-    /* Create initial NOTIFY request */
-    status = pjsip_xfer_notify( sub, PJSIP_EVSUB_STATE_ACTIVE,
-                                100, NULL, &tdata);
-    if (status != PJ_SUCCESS) {
-        pjsua_perror(THIS_FILE, "Unable to create NOTIFY to REFER", status);
-        return;
-    }
-
-    /* Send initial NOTIFY request */
-    status = pjsip_xfer_send_request( sub, tdata);
-    if (status != PJ_SUCCESS) {
-        pjsua_perror(THIS_FILE, "Unable to send NOTIFY to REFER", status);
-        return;
-    }
-
-    /* We're cheating here.
-     * We need to get a null terminated string from a pj_str_t.
-     * So grab the pointer from the hvalue and NULL terminate it, knowing
-     * that the NULL position will be occupied by a newline. 
-     */
-    uri = refer_to->hvalue.ptr;
-    uri[refer_to->hvalue.slen] = '\0';
-
-    /* Now make the outgoing call. */
-    tmp = pj_str(uri);
-    status = pjsua_call_make_call(existing_call->acc_index, &tmp, &new_call);
-    if (status != PJ_SUCCESS) {
-
-        /* Notify xferer about the error */
-        status = pjsip_xfer_notify(sub, PJSIP_EVSUB_STATE_TERMINATED,
-                                   500, NULL, &tdata);
-        if (status != PJ_SUCCESS) {
-            pjsua_perror(THIS_FILE, "Unable to create NOTIFY to REFER", 
-                          status);
-            return;
-        }
-        status = pjsip_xfer_send_request(sub, tdata);
-        if (status != PJ_SUCCESS) {
-            pjsua_perror(THIS_FILE, "Unable to send NOTIFY to REFER", 
-                          status);
-            return;
-        }
-        return;
-    }
-
-    /* Put the server subscription in inv_data.
-     * Subsequent state changed in pjsua_inv_on_state_changed() will be
-     * reported back to the server subscription.
-     */
-    pjsua.calls[new_call].xfer_sub = sub;
-
-    /* Put the invite_data in the subscription. */
-    pjsip_evsub_set_mod_data(sub, pjsua.mod.id, &pjsua.calls[new_call]);
-}
-
-
-/*
- * This callback is called when transaction state has changed in INVITE
- * session. We use this to trap:
- *  - incoming REFER request.
- *  - incoming MESSAGE request.
- */
-static void pjsua_call_on_tsx_state_changed(pjsip_inv_session *inv,
-                                            pjsip_transaction *tsx,
-                                            pjsip_event *e)
-{
-    pjsua_call *call = inv->dlg->mod_data[pjsua.mod.id];
-
-    if (tsx->role==PJSIP_ROLE_UAS &&
-        tsx->state==PJSIP_TSX_STATE_TRYING &&
-        pjsip_method_cmp(&tsx->method, &pjsip_refer_method)==0)
-    {
-        /*
-         * Incoming REFER request.
-         */
-        on_call_transfered(call->inv, e->body.tsx_state.src.rdata);
-
-    }
-    else if (tsx->role==PJSIP_ROLE_UAS &&
-             tsx->state==PJSIP_TSX_STATE_TRYING &&
-             pjsip_method_cmp(&tsx->method, &pjsip_message_method)==0)
-    {
-        /*
-         * Incoming MESSAGE request!
-         */
-        pjsip_rx_data *rdata;
-        pjsip_msg *msg;
-        pjsip_accept_hdr *accept_hdr;
-        pj_status_t status;
-
-        rdata = e->body.tsx_state.src.rdata;
-        msg = rdata->msg_info.msg;
-
-        /* Request MUST have message body, with Content-Type equal to
-         * "text/plain".
-         */
-        if (pjsua_im_accept_pager(rdata, &accept_hdr) == PJ_FALSE) {
-
-            pjsip_hdr hdr_list;
-
-            pj_list_init(&hdr_list);
-            pj_list_push_back(&hdr_list, accept_hdr);
-
-            pjsip_dlg_respond( inv->dlg, rdata, PJSIP_SC_NOT_ACCEPTABLE_HERE, 
-                               NULL, &hdr_list, NULL );
-            return;
-        }
-
-        /* Respond with 200 first, so that remote doesn't retransmit in case
-         * the UI takes too long to process the message. 
-         */
-        status = pjsip_dlg_respond( inv->dlg, rdata, 200, NULL, NULL, NULL);
-
-        /* Process MESSAGE request */
-        pjsua_im_process_pager(call->index, &inv->dlg->remote.info_str,
-                               &inv->dlg->local.info_str, rdata);
-    }
-
-}
-
+        --pjsua_var.call_cnt;
+    }
+
+    PJSUA_UNLOCK();
+}
 
 /*
@@ -971 +1696 @@
 }
 
-
-/*
- * Create inactive SDP for call hold.
- */
-static pj_status_t create_inactive_sdp(pjsua_call *call,
-                                       pjmedia_sdp_session **p_answer)
-{
-    pj_status_t status;
-    pjmedia_sdp_conn *conn;
-    pjmedia_sdp_attr *attr;
-    pjmedia_sdp_session *sdp;
-
-    /* Create new offer */
-    status = pjmedia_endpt_create_sdp(pjsua.med_endpt, pjsua.pool, 1,
-                                      &call->skinfo, &sdp);
-    if (status != PJ_SUCCESS) {
-        pjsua_perror(THIS_FILE, "Unable to create local SDP", status);
-        return status;
-    }
-
-    /* Get SDP media connection line */
-    conn = sdp->media[0]->conn;
-    if (!conn)
-        conn = sdp->conn;
-
-    /* Modify address */
-    conn->addr = pj_str("0.0.0.0");
-
-    /* Remove existing directions attributes */
-    pjmedia_sdp_media_remove_all_attr(sdp->media[0], "sendrecv");
-    pjmedia_sdp_media_remove_all_attr(sdp->media[0], "sendonly");
-    pjmedia_sdp_media_remove_all_attr(sdp->media[0], "recvonly");
-    pjmedia_sdp_media_remove_all_attr(sdp->media[0], "inactive");
-
-    /* Add inactive attribute */
-    attr = pjmedia_sdp_attr_create(pjsua.pool, "inactive", NULL);
-    pjmedia_sdp_media_add_attr(sdp->media[0], attr);
-
-    *p_answer = sdp;
-
-    return status;
-}
-
-/*
- * Called when session received new offer.
- */
-static void pjsua_call_on_rx_offer(pjsip_inv_session *inv,
-                                   const pjmedia_sdp_session *offer)
-{
-    pjsua_call *call;
-    pjmedia_sdp_conn *conn;
-    pjmedia_sdp_session *answer;
-    pj_bool_t is_remote_active;
-    pj_status_t status;
-
-    call = inv->dlg->mod_data[pjsua.mod.id];
-
-    /*
-     * See if remote is offering active media (i.e. not on-hold)
-     */
-    is_remote_active = PJ_TRUE;
-
-    conn = offer->media[0]->conn;
-    if (!conn)
-        conn = offer->conn;
-
-    if (pj_strcmp2(&conn->addr, "0.0.0.0")==0 ||
-        pj_strcmp2(&conn->addr, "0")==0)
-    {
-        is_remote_active = PJ_FALSE;
-
-    } 
-    else if (pjmedia_sdp_media_find_attr2(offer->media[0], "inactive", NULL))
-    {
-        is_remote_active = PJ_FALSE;
-    }
-
-    PJ_LOG(4,(THIS_FILE, "Received SDP offer, remote media is %s",
-              (is_remote_active ? "active" : "inactive")));
-
-    /* Supply candidate answer */
-    if (is_remote_active) {
-        status = pjmedia_endpt_create_sdp( pjsua.med_endpt, call->inv->pool, 1,
-                                           &call->skinfo, &answer);
-    } else {
-        status = create_inactive_sdp( call, &answer );
-    }
-
-    if (status != PJ_SUCCESS) {
-        pjsua_perror(THIS_FILE, "Unable to create local SDP", status);
-        return;
-    }
-
-    status = pjsip_inv_set_sdp_answer(call->inv, answer);
-    if (status != PJ_SUCCESS) {
-        pjsua_perror(THIS_FILE, "Unable to set answer", status);
-        return;
-    }
-
-}
-
-#if 0
-/* Disconnect call */
-static void call_disconnect(pjsip_inv_session *inv,
-                            int st_code)
-{
-    pjsip_tx_data *tdata;
-    pj_status_t status;
-
-    status = pjsip_inv_end_session(inv, st_code, NULL, &tdata);
-    if (status == PJ_SUCCESS)
-        status = pjsip_inv_send_msg(inv, tdata);
-
-    if (status != PJ_SUCCESS) {
-        pjsua_perror(THIS_FILE, "Unable to disconnect call", status);
-    }
-}
-#endif
 
 /*
@@ -1098 +1705 @@
                                        pj_status_t status)
 {
+    int prev_media_st = 0;
     pjsua_call *call;
     pjmedia_session_info sess_info;
@@ -1106 +1714 @@
     char tmp[PJSIP_MAX_URL_SIZE];
 
-    call = inv->dlg->mod_data[pjsua.mod.id];
+    PJSUA_LOCK();
+
+    call = inv->dlg->mod_data[pjsua_var.mod.id];
 
     if (status != PJ_SUCCESS) {
@@ -1120 +1730 @@
             //call_disconnect(inv, PJSIP_SC_UNSUPPORTED_MEDIA_TYPE);
         }
+
+        PJSUA_UNLOCK();
         return;
-
     }
 
     /* Destroy existing media session, if any. */
 
-    if (call)
+    if (call) {
+        prev_media_st = call->media_st;
         call_destroy_media(call->index);
+    }
 
     /* Get local and remote SDP */
@@ -1137 +1750 @@
                      status);
         //call_disconnect(inv, PJSIP_SC_UNSUPPORTED_MEDIA_TYPE);
+        PJSUA_UNLOCK();
         return;
     }
@@ -1147 +1761 @@
                      status);
         //call_disconnect(inv, PJSIP_SC_UNSUPPORTED_MEDIA_TYPE);
+        PJSUA_UNLOCK();
         return;
     }
-
-    if (pjsua.config.null_audio)
-        return;
 
     /* Create media session info based on SDP parameters. 
@@ -1157 +1769 @@
      */    
     status = pjmedia_session_info_from_sdp( call->inv->dlg->pool, 
-                                            pjsua.med_endpt, 
+                                            pjsua_var.med_endpt, 
                                             1,&sess_info, 
                                             local_sdp, remote_sdp);
@@ -1164 +1776 @@
                      status);
         //call_disconnect(inv, PJSIP_SC_UNSUPPORTED_MEDIA_TYPE);
+        PJSUA_UNLOCK();
         return;
     }
 
-    /* Override ptime, if this option is specified. */
-    if (pjsua.config.ptime) {
-        sess_info.stream_info[0].param->setting.frm_per_pkt = (pj_uint8_t)
-            (pjsua.config.ptime / 
-              sess_info.stream_info[0].param->info.frm_ptime);
-        if (sess_info.stream_info[0].param->setting.frm_per_pkt==0)
-            sess_info.stream_info[0].param->setting.frm_per_pkt = 1;
-    }
-
-    /* Optionally, application may modify other stream settings here
-     * (such as jitter buffer parameters, codec ptime, etc.)
-     */
-
-    /* Create session based on session info. */
-    status = pjmedia_session_create( pjsua.med_endpt, &sess_info,
-                                     &call->med_tp,
-                                     call, &call->session );
-    if (status != PJ_SUCCESS) {
-        pjsua_perror(THIS_FILE, "Unable to create media session", 
-                     status);
-        //call_disconnect(inv, PJSIP_SC_UNSUPPORTED_MEDIA_TYPE);
-        return;
-    }
-
-
-    /* Get the port interface of the first stream in the session.
-     * We need the port interface to add to the conference bridge.
-     */
-    pjmedia_session_get_port(call->session, 0, &media_port);
-
-
-    /*
-     * Add the call to conference bridge.
-     */
-    port_name.ptr = tmp;
-    port_name.slen = pjsip_uri_print(PJSIP_URI_IN_REQ_URI,
-                                     call->inv->dlg->remote.info->uri,
-                                     tmp, sizeof(tmp));
-    if (port_name.slen < 1) {
-        port_name = pj_str("call");
-    }
-    status = pjmedia_conf_add_port( pjsua.mconf, call->inv->pool,
-                                    media_port, 
-                                    &port_name,
-                                    &call->conf_slot);
-    if (status != PJ_SUCCESS) {
-        pjsua_perror(THIS_FILE, "Unable to create conference slot", 
-                     status);
-        call_destroy_media(call->index);
-        //call_disconnect(inv, PJSIP_SC_INTERNAL_SERVER_ERROR);
-        return;
-    }
-
-    /* If auto-play is configured, connect the call to the file player 
-     * port 
-     */
-    if (pjsua.config.auto_play && pjsua.config.wav_file.slen && 
-        call->inv->role == PJSIP_ROLE_UAS) 
+    /* Check if media is put on-hold */
+    if (sess_info.stream_cnt == 0 || 
+        sess_info.stream_info[0].dir == PJMEDIA_DIR_NONE)
     {
 
-        pjmedia_conf_connect_port( pjsua.mconf, pjsua.player[0].slot, 
-                                   call->conf_slot, 0);
-
-    }
-    if (pjsua.config.auto_loop && call->inv->role == PJSIP_ROLE_UAS) {
-
-        pjmedia_conf_connect_port( pjsua.mconf, call->conf_slot, 
-                                   call->conf_slot, 0);
-
-    }
-    if (pjsua.config.auto_conf) {
-        unsigned i;
-
-        pjmedia_conf_connect_port( pjsua.mconf, 0, call->conf_slot, 0);
-        pjmedia_conf_connect_port( pjsua.mconf, call->conf_slot, 0, 0);
-
-        for (i=0; i < pjsua.config.max_calls; ++i) {
-
-            if (!pjsua.calls[i].session)
-                continue;
-
-            pjmedia_conf_connect_port( pjsua.mconf, call->conf_slot, 
-                                       pjsua.calls[i].conf_slot, 0);
-            pjmedia_conf_connect_port( pjsua.mconf, pjsua.calls[i].conf_slot,
-                                       call->conf_slot, 0);
+        /* Determine who puts the call on-hold */
+        if (prev_media_st == PJSUA_CALL_MEDIA_ACTIVE) {
+            if (pjmedia_sdp_neg_was_answer_remote(call->inv->neg)) {
+                /* It was local who offer hold */
+                call->media_st = PJSUA_CALL_MEDIA_LOCAL_HOLD;
+            } else {
+                call->media_st = PJSUA_CALL_MEDIA_REMOTE_HOLD;
+            }
         }
 
-    } 
-    
-    /* Normal operation: if no auto_xx is given, connect new call to 
-     * the sound device port (port zero) in the main conference bridge.
-     */
-    if (pjsua.config.auto_play == 0 && pjsua.config.auto_loop == 0 &&
-        pjsua.config.auto_conf == 0)
+        call->media_dir = PJMEDIA_DIR_NONE;
+
+    } else {
+
+        /* Override ptime, if this option is specified. */
+        PJ_TODO(set_codec_ptime_in_call);
+
+
+        /* Optionally, application may modify other stream settings here
+         * (such as jitter buffer parameters, codec ptime, etc.)
+         */
+
+        /* Create session based on session info. */
+        status = pjmedia_session_create( pjsua_var.med_endpt, &sess_info,
+                                         &call->med_tp,
+                                         call, &call->session );
+        if (status != PJ_SUCCESS) {
+            pjsua_perror(THIS_FILE, "Unable to create media session", 
+                         status);
+            //call_disconnect(inv, PJSIP_SC_UNSUPPORTED_MEDIA_TYPE);
+            PJSUA_UNLOCK();
+            return;
+        }
+
+
+        /* Get the port interface of the first stream in the session.
+         * We need the port interface to add to the conference bridge.
+         */
+        pjmedia_session_get_port(call->session, 0, &media_port);
+
+
+        /*
+         * Add the call to conference bridge.
+         */
+        port_name.ptr = tmp;
+        port_name.slen = pjsip_uri_print(PJSIP_URI_IN_REQ_URI,
+                                         call->inv->dlg->remote.info->uri,
+                                         tmp, sizeof(tmp));
+        if (port_name.slen < 1) {
+            port_name = pj_str("call");
+        }
+        status = pjmedia_conf_add_port( pjsua_var.mconf, call->inv->pool,
+                                        media_port, 
+                                        &port_name,
+                                        (unsigned*)&call->conf_slot);
+        if (status != PJ_SUCCESS) {
+            pjsua_perror(THIS_FILE, "Unable to create conference slot", 
+                         status);
+            call_destroy_media(call->index);
+            //call_disconnect(inv, PJSIP_SC_INTERNAL_SERVER_ERROR);
+            PJSUA_UNLOCK();
+            return;
+        }
+
+        /* Call's media state is active */
+        call->media_st = PJSUA_CALL_MEDIA_ACTIVE;
+        call->media_dir = sess_info.stream_info[0].dir;
+    }
+
+    /* Print info. */
     {
-        pjmedia_conf_connect_port( pjsua.mconf, 0, call->conf_slot, 0);
-        pjmedia_conf_connect_port( pjsua.mconf, call->conf_slot, 0, 0);
-    }
-
-
-    /* Done. */
-    {
-        struct pjmedia_session_info sess_info;
         char info[80];
         int info_len = 0;
         unsigned i;
 
-        pjmedia_session_get_info(call->session, &sess_info);
         for (i=0; i<sess_info.stream_cnt; ++i) {
             int len;
@@ -1305 +1890 @@
                 info_len += len;
         }
-        PJ_LOG(3,(THIS_FILE,"Media started%s", info));
-    }
-}
-
-
-/*
- * Hangup call.
- */
-PJ_DEF(void) pjsua_call_hangup(int call_index)
-{
+        PJ_LOG(4,(THIS_FILE,"Media updates%s", info));
+    }
+
+    /* Call application callback, if any */
+    if (pjsua_var.ua_cfg.cb.on_call_media_state)
+        pjsua_var.ua_cfg.cb.on_call_media_state(call->index);
+
+
+    PJSUA_UNLOCK();
+}
+
+
+/*
+ * Create inactive SDP for call hold.
+ */
+static pj_status_t create_inactive_sdp(pjsua_call *call,
+                                       pjmedia_sdp_session **p_answer)
+{
+    pj_status_t status;
+    pjmedia_sdp_conn *conn;
+    pjmedia_sdp_attr *attr;
+    pjmedia_sdp_session *sdp;
+
+    /* Create new offer */
+    status = pjmedia_endpt_create_sdp(pjsua_var.med_endpt, pjsua_var.pool, 1,
+                                      &call->skinfo, &sdp);
+    if (status != PJ_SUCCESS) {
+        pjsua_perror(THIS_FILE, "Unable to create local SDP", status);
+        return status;
+    }
+
+    /* Get SDP media connection line */
+    conn = sdp->media[0]->conn;
+    if (!conn)
+        conn = sdp->conn;
+
+    /* Modify address */
+    conn->addr = pj_str("0.0.0.0");
+
+    /* Remove existing directions attributes */
+    pjmedia_sdp_media_remove_all_attr(sdp->media[0], "sendrecv");
+    pjmedia_sdp_media_remove_all_attr(sdp->media[0], "sendonly");
+    pjmedia_sdp_media_remove_all_attr(sdp->media[0], "recvonly");
+    pjmedia_sdp_media_remove_all_attr(sdp->media[0], "inactive");
+
+    /* Add inactive attribute */
+    attr = pjmedia_sdp_attr_create(pjsua_var.pool, "inactive", NULL);
+    pjmedia_sdp_media_add_attr(sdp->media[0], attr);
+
+    *p_answer = sdp;
+
+    return status;
+}
+
+
+/*
+ * Called when session received new offer.
+ */
+static void pjsua_call_on_rx_offer(pjsip_inv_session *inv,
+                                   const pjmedia_sdp_session *offer)
+{
+    const char *remote_state;
     pjsua_call *call;
-    int code;
+    pjmedia_sdp_conn *conn;
+    pjmedia_sdp_session *answer;
+    pj_bool_t is_remote_active;
+    pj_status_t status;
+
+    PJSUA_LOCK();
+
+    call = inv->dlg->mod_data[pjsua_var.mod.id];
+
+    /*
+     * See if remote is offering active media (i.e. not on-hold)
+     */
+    is_remote_active = PJ_TRUE;
+
+    conn = offer->media[0]->conn;
+    if (!conn)
+        conn = offer->conn;
+
+    if (pj_strcmp2(&conn->addr, "0.0.0.0")==0 ||
+        pj_strcmp2(&conn->addr, "0")==0)
+    {
+        is_remote_active = PJ_FALSE;
+
+    } 
+    else if (pjmedia_sdp_media_find_attr2(offer->media[0], "inactive", NULL))
+    {
+        is_remote_active = PJ_FALSE;
+    }
+
+    remote_state = (is_remote_active ? "active" : "inactive");
+
+    /* Supply candidate answer */
+    if (call->media_st == PJSUA_CALL_MEDIA_LOCAL_HOLD || !is_remote_active) {
+        PJ_LOG(4,(THIS_FILE, 
+                  "Call %d: RX new media offer, creating inactive SDP "
+                  "(media in offer is %s)", call->index, remote_state));
+        status = create_inactive_sdp( call, &answer );
+    } else {
+        PJ_LOG(4,(THIS_FILE, "Call %d: received updated media offer",
+                  call->index));
+        status = pjmedia_endpt_create_sdp( pjsua_var.med_endpt, 
+                                           call->inv->pool, 1,
+                                           &call->skinfo, &answer);     
+    }
+
+    if (status != PJ_SUCCESS) {
+        pjsua_perror(THIS_FILE, "Unable to create local SDP", status);
+        PJSUA_UNLOCK();
+        return;
+    }
+
+    status = pjsip_inv_set_sdp_answer(call->inv, answer);
+    if (status != PJ_SUCCESS) {
+        pjsua_perror(THIS_FILE, "Unable to set answer", status);
+        PJSUA_UNLOCK();
+        return;
+    }
+
+    PJSUA_UNLOCK();
+}
+
+
+/*
+ * Callback called by event framework when the xfer subscription state
+ * has changed.
+ */
+static void xfer_on_evsub_state( pjsip_evsub *sub, pjsip_event *event)
+{
+    
+    PJ_UNUSED_ARG(event);
+
+    /*
+     * We're only interested when subscription is terminated, to 
+     * clear the xfer_sub member of the inv_data.
+     */
+    if (pjsip_evsub_get_state(sub) == PJSIP_EVSUB_STATE_TERMINATED) {
+        pjsua_call *call;
+
+        call = pjsip_evsub_get_mod_data(sub, pjsua_var.mod.id);
+        if (!call)
+            return;
+
+        pjsip_evsub_set_mod_data(sub, pjsua_var.mod.id, NULL);
+        call->xfer_sub = NULL;
+
+        PJ_LOG(3,(THIS_FILE, "Xfer subscription terminated"));
+    }
+}
+
+
+/*
+ * Follow transfer (REFER) request.
+ */
+static void on_call_transfered( pjsip_inv_session *inv,
+                                pjsip_rx_data *rdata )
+{
     pj_status_t status;
     pjsip_tx_data *tdata;
-
-
-    call = &pjsua.calls[call_index];
-
-    if (!call->inv) {
-        PJ_LOG(3,(THIS_FILE,"Call has been disconnected"));
+    pjsua_call *existing_call;
+    int new_call;
+    const pj_str_t str_refer_to = { "Refer-To", 8};
+    pjsip_generic_string_hdr *refer_to;
+    char *uri;
+    pj_str_t tmp;
+    struct pjsip_evsub_user xfer_cb;
+    pjsip_status_code code;
+    pjsip_evsub *sub;
+
+    existing_call = inv->dlg->mod_data[pjsua_var.mod.id];
+
+    /* Find the Refer-To header */
+    refer_to = (pjsip_generic_string_hdr*)
+        pjsip_msg_find_hdr_by_name(rdata->msg_info.msg, &str_refer_to, NULL);
+
+    if (refer_to == NULL) {
+        /* Invalid Request.
+         * No Refer-To header!
+         */
+        PJ_LOG(4,(THIS_FILE, "Received REFER without Refer-To header!"));
+        pjsip_dlg_respond( inv->dlg, rdata, 400, NULL, NULL, NULL);
         return;
     }
 
-    if (call->inv->state == PJSIP_INV_STATE_CONFIRMED)
-        code = PJSIP_SC_OK;
-    else if (call->inv->role == PJSIP_ROLE_UAS)
-        code = PJSIP_SC_DECLINE;
-    else
-        code = PJSIP_SC_REQUEST_TERMINATED;
-
-    status = pjsip_inv_end_session(call->inv, code, NULL, &tdata);
-    if (status != PJ_SUCCESS) {
-        pjsua_perror(THIS_FILE, 
-                     "Failed to create end session message", 
-                     status);
+    /* Notify callback */
+    code = PJSIP_SC_OK;
+    if (pjsua_var.ua_cfg.cb.on_call_transfered)
+        (*pjsua_var.ua_cfg.cb.on_call_transfered)(existing_call->index,
+                                                  &refer_to->hvalue, &code);
+
+    if (code < 200)
+        code = 200;
+    if (code >= 300) {
+        /* Application rejects call transfer request */
+        pjsip_dlg_respond( inv->dlg, rdata, code, NULL, NULL, NULL);
         return;
     }
 
-    /* pjsip_inv_end_session may return PJ_SUCCESS with NULL 
-     * as p_tdata when INVITE transaction has not been answered
-     * with any provisional responses.
+    PJ_LOG(3,(THIS_FILE, "Call to %.*s is being transfered to %.*s",
+              (int)inv->dlg->remote.info_str.slen,
+              inv->dlg->remote.info_str.ptr,
+              (int)refer_to->hvalue.slen, 
+              refer_to->hvalue.ptr));
+
+    /* Init callback */
+    pj_memset(&xfer_cb, 0, sizeof(xfer_cb));
+    xfer_cb.on_evsub_state = &xfer_on_evsub_state;
+
+    /* Create transferee event subscription */
+    status = pjsip_xfer_create_uas( inv->dlg, &xfer_cb, rdata, &sub);
+    if (status != PJ_SUCCESS) {
+        pjsua_perror(THIS_FILE, "Unable to create xfer uas", status);
+        pjsip_dlg_respond( inv->dlg, rdata, 500, NULL, NULL, NULL);
+        return;
+    }
+
+    /* Accept the REFER request, send 200 (OK). */
+    pjsip_xfer_accept(sub, rdata, code, NULL);
+
+    /* Create initial NOTIFY request */
+    status = pjsip_xfer_notify( sub, PJSIP_EVSUB_STATE_ACTIVE,
+                                100, NULL, &tdata);
+    if (status != PJ_SUCCESS) {
+        pjsua_perror(THIS_FILE, "Unable to create NOTIFY to REFER", status);
+        return;
+    }
+
+    /* Send initial NOTIFY request */
+    status = pjsip_xfer_send_request( sub, tdata);
+    if (status != PJ_SUCCESS) {
+        pjsua_perror(THIS_FILE, "Unable to send NOTIFY to REFER", status);
+        return;
+    }
+
+    /* We're cheating here.
+     * We need to get a null terminated string from a pj_str_t.
+     * So grab the pointer from the hvalue and NULL terminate it, knowing
+     * that the NULL position will be occupied by a newline. 
      */
-    if (tdata == NULL)
+    uri = refer_to->hvalue.ptr;
+    uri[refer_to->hvalue.slen] = '\0';
+
+    /* Now make the outgoing call. */
+    tmp = pj_str(uri);
+    status = pjsua_call_make_call(existing_call->acc_id, &tmp, 0,
+                                  existing_call->user_data, NULL, 
+                                  &new_call);
+    if (status != PJ_SUCCESS) {
+
+        /* Notify xferer about the error */
+        status = pjsip_xfer_notify(sub, PJSIP_EVSUB_STATE_TERMINATED,
+                                   500, NULL, &tdata);
+        if (status != PJ_SUCCESS) {
+            pjsua_perror(THIS_FILE, "Unable to create NOTIFY to REFER", 
+                          status);
+            return;
+        }
+        status = pjsip_xfer_send_request(sub, tdata);
+        if (status != PJ_SUCCESS) {
+            pjsua_perror(THIS_FILE, "Unable to send NOTIFY to REFER", 
+                          status);
+            return;
+        }
         return;
-
-    status = pjsip_inv_send_msg(call->inv, tdata);
-    if (status != PJ_SUCCESS) {
-        pjsua_perror(THIS_FILE, 
-                     "Failed to send end session message", 
-                     status);
-        return;
-    }
-}
-
-
-/*
- * Put call on-Hold.
- */
-PJ_DEF(pj_status_t) pjsua_call_set_hold(int call_index)
-{
-    pjmedia_sdp_session *sdp;
-    pjsua_call *call;
-    pjsip_tx_data *tdata;
-    pj_status_t status;
-
-    call = &pjsua.calls[call_index];
-    
-    if (!call->inv) {
-        PJ_LOG(3,(THIS_FILE,"Call has been disconnected"));
-        return PJSIP_ESESSIONTERMINATED;
-    }
-
-    if (call->inv->state != PJSIP_INV_STATE_CONFIRMED) {
-        PJ_LOG(3,(THIS_FILE, "Can not hold call that is not confirmed"));
-        return PJSIP_ESESSIONSTATE;
-    }
-
-    status = create_inactive_sdp(call, &sdp);
-    if (status != PJ_SUCCESS)
-        return status;
-
-    /* Send re-INVITE with new offer */
-    status = pjsip_inv_reinvite( call->inv, NULL, sdp, &tdata);
-    if (status != PJ_SUCCESS) {
-        pjsua_perror(THIS_FILE, "Unable to create re-INVITE", status);
-        return status;
-    }
-
-    status = pjsip_inv_send_msg( call->inv, tdata);
-    if (status != PJ_SUCCESS) {
-        pjsua_perror(THIS_FILE, "Unable to send re-INVITE", status);
-        return status;
-    }
-
-    return PJ_SUCCESS;
-}
-
-
-/*
- * re-INVITE.
- */
-PJ_DEF(pj_status_t) pjsua_call_reinvite(int call_index)
-{
-    pjmedia_sdp_session *sdp;
-    pjsip_tx_data *tdata;
-    pjsua_call *call;
-    pj_status_t status;
-
-    call = &pjsua.calls[call_index];
-
-    if (!call->inv) {
-        PJ_LOG(3,(THIS_FILE,"Call has been disconnected"));
-        return PJSIP_ESESSIONTERMINATED;
-    }
-
-
-    if (call->inv->state != PJSIP_INV_STATE_CONFIRMED) {
-        PJ_LOG(3,(THIS_FILE, "Can not re-INVITE call that is not confirmed"));
-        return PJSIP_ESESSIONSTATE;
-    }
-
-    /* Create SDP */
-    status = pjmedia_endpt_create_sdp( pjsua.med_endpt, call->inv->pool, 1,
-                                       &call->skinfo, &sdp);
-    if (status != PJ_SUCCESS) {
-        pjsua_perror(THIS_FILE, "Unable to get SDP from media endpoint", 
-                     status);
-        return status;
-    }
-
-    /* Send re-INVITE with new offer */
-    status = pjsip_inv_reinvite( call->inv, NULL, sdp, &tdata);
-    if (status != PJ_SUCCESS) {
-        pjsua_perror(THIS_FILE, "Unable to create re-INVITE", status);
-        return status;
-    }
-
-    status = pjsip_inv_send_msg( call->inv, tdata);
-    if (status != PJ_SUCCESS) {
-        pjsua_perror(THIS_FILE, "Unable to send re-INVITE", status);
-        return status;
-    }
-
-    return PJ_SUCCESS;
-}
-
-
-/*
- * Transfer call.
- */
-PJ_DEF(pj_status_t) pjsua_call_xfer(unsigned call_index, const pj_str_t *dest)
-{
-    pjsip_evsub *sub;
-    pjsip_tx_data *tdata;
-    pjsua_call *call;
-    pj_status_t status;
-
-    
-    call = &pjsua.calls[call_index];
-
-    if (!call->inv) {
-        PJ_LOG(3,(THIS_FILE,"Call has been disconnected"));
-        return PJSIP_ESESSIONTERMINATED;
-    }
-   
-    /* Create xfer client subscription.
-     * We're not interested in knowing the transfer result, so we
-     * put NULL as the callback.
+    }
+
+    /* Put the server subscription in inv_data.
+     * Subsequent state changed in pjsua_inv_on_state_changed() will be
+     * reported back to the server subscription.
      */
-    status = pjsip_xfer_create_uac(call->inv->dlg, NULL, &sub);
-    if (status != PJ_SUCCESS) {
-        pjsua_perror(THIS_FILE, "Unable to create xfer", status);
-        return status;
-    }
-
-    /*
-     * Create REFER request.
-     */
-    status = pjsip_xfer_initiate(sub, dest, &tdata);
-    if (status != PJ_SUCCESS) {
-        pjsua_perror(THIS_FILE, "Unable to create REFER request", status);
-        return status;
-    }
-
-    /* Send. */
-    status = pjsip_xfer_send_request(sub, tdata);
-    if (status != PJ_SUCCESS) {
-        pjsua_perror(THIS_FILE, "Unable to send REFER request", status);
-        return status;
-    }
-
-    /* For simplicity (that's what this program is intended to be!), 
-     * leave the original invite session as it is. More advanced application
-     * may want to hold the INVITE, or terminate the invite, or whatever.
-     */
-
-    return PJ_SUCCESS;
-}
-
-
-/**
- * Dial DTMF.
- */
-PJ_DEF(pj_status_t) pjsua_call_dial_dtmf( unsigned call_index, 
-                                          const pj_str_t *digits)
-{
-    pjsua_call *call = &pjsua.calls[call_index];
-
-    PJ_ASSERT_RETURN(call_index < pjsua.config.max_calls, PJ_EINVAL);
-
-    if (!call->session) {
-        PJ_LOG(3,(THIS_FILE, "Media is not established yet!"));
-        return -1;
-    }
-
-    return pjmedia_session_dial_dtmf( call->session, 0, digits);
-}
-
-
-/**
- * Send instant messaging inside INVITE session.
- */
-PJ_DEF(pj_status_t) pjsua_call_send_im(int call_index, const pj_str_t *str)
-{
-    pjsua_call *call;
-    const pj_str_t mime_text = pj_str("text");
-    const pj_str_t mime_plain = pj_str("plain");
-    pjsip_tx_data *tdata;
-    pj_status_t status;
-
-    call = &pjsua.calls[call_index];
-
-    if (!call->inv) {
-        PJ_LOG(3,(THIS_FILE,"Call has been disconnected"));
-        return PJSIP_ESESSIONTERMINATED;
-    }
-
-    /* Lock dialog. */
-    pjsip_dlg_inc_lock(call->inv->dlg);
-    
-    /* Create request message. */
-    status = pjsip_dlg_create_request( call->inv->dlg, &pjsip_message_method,
-                                       -1, &tdata);
-    if (status != PJ_SUCCESS) {
-        pjsua_perror(THIS_FILE, "Unable to create MESSAGE request", status);
-        goto on_return;
-    }
-
-    /* Add accept header. */
-    pjsip_msg_add_hdr( tdata->msg, 
-                       (pjsip_hdr*)pjsua_im_create_accept(tdata->pool));
-
-    /* Create "text/plain" message body. */
-    tdata->msg->body = pjsip_msg_body_create( tdata->pool, &mime_text,
-                                              &mime_plain, str);
-    if (tdata->msg->body == NULL) {
-        pjsua_perror(THIS_FILE, "Unable to create msg body", PJ_ENOMEM);
-        pjsip_tx_data_dec_ref(tdata);
-        goto on_return;
-    }
-
-    /* Send the request. */
-    status = pjsip_dlg_send_request( call->inv->dlg, tdata, -1, NULL);
-    if (status != PJ_SUCCESS) {
-        pjsua_perror(THIS_FILE, "Unable to send MESSAGE request", status);
-        goto on_return;
-    }
-
-on_return:
-    pjsip_dlg_dec_lock(call->inv->dlg);
-    return status;
-}
-
-
-/**
- * Send IM typing indication inside INVITE session.
- */
-PJ_DEF(pj_status_t) pjsua_call_send_typing_ind(int call_index, 
-                                               pj_bool_t is_typing)
-{
-    pjsua_call *call;
-    pjsip_tx_data *tdata;
-    pj_status_t status;
-
-    call = &pjsua.calls[call_index];
-
-    if (!call->inv) {
-        PJ_LOG(3,(THIS_FILE,"Call has been disconnected"));
-        return PJSIP_ESESSIONTERMINATED;
-    }
-
-    /* Lock dialog. */
-    pjsip_dlg_inc_lock(call->inv->dlg);
-    
-    /* Create request message. */
-    status = pjsip_dlg_create_request( call->inv->dlg, &pjsip_message_method,
-                                       -1, &tdata);
-    if (status != PJ_SUCCESS) {
-        pjsua_perror(THIS_FILE, "Unable to create MESSAGE request", status);
-        goto on_return;
-    }
-
-    /* Create "application/im-iscomposing+xml" msg body. */
-    tdata->msg->body = pjsip_iscomposing_create_body(tdata->pool, is_typing,
-                                                     NULL, NULL, -1);
-
-    /* Send the request. */
-    status = pjsip_dlg_send_request( call->inv->dlg, tdata, -1, NULL);
-    if (status != PJ_SUCCESS) {
-        pjsua_perror(THIS_FILE, "Unable to send MESSAGE request", status);
-        goto on_return;
-    }
-
-on_return:
-    pjsip_dlg_dec_lock(call->inv->dlg);
-    return status;
-}
-
-
-/*
- * Terminate all calls.
- */
-PJ_DEF(void) pjsua_call_hangup_all(void)
-{
-    unsigned i;
-
-    for (i=0; i<pjsua.config.max_calls; ++i) {
-        pjsip_tx_data *tdata;
-        int st_code;
-        pjsua_call *call;
-
-        if (pjsua.calls[i].inv == NULL)
-            continue;
-
-        call = &pjsua.calls[i];
-
-        if (call->inv->state == PJSIP_INV_STATE_CONFIRMED) {
-            st_code = 200;
-        } else {
-            st_code = PJSIP_SC_GONE;
+    pjsua_var.calls[new_call].xfer_sub = sub;
+
+    /* Put the invite_data in the subscription. */
+    pjsip_evsub_set_mod_data(sub, pjsua_var.mod.id, 
+                             &pjsua_var.calls[new_call]);
+}
+
+
+
+/*
+ * This callback is called when transaction state has changed in INVITE
+ * session. We use this to trap:
+ *  - incoming REFER request.
+ *  - incoming MESSAGE request.
+ */
+static void pjsua_call_on_tsx_state_changed(pjsip_inv_session *inv,
+                                            pjsip_transaction *tsx,
+                                            pjsip_event *e)
+{
+    pjsua_call *call = inv->dlg->mod_data[pjsua_var.mod.id];
+
+    PJSUA_LOCK();
+
+    if (tsx->role==PJSIP_ROLE_UAS &&
+        tsx->state==PJSIP_TSX_STATE_TRYING &&
+        pjsip_method_cmp(&tsx->method, &pjsip_refer_method)==0)
+    {
+        /*
+         * Incoming REFER request.
+         */
+        on_call_transfered(call->inv, e->body.tsx_state.src.rdata);
+
+    }
+    else if (tsx->role==PJSIP_ROLE_UAS &&
+             tsx->state==PJSIP_TSX_STATE_TRYING &&
+             pjsip_method_cmp(&tsx->method, &pjsip_message_method)==0)
+    {
+        /*
+         * Incoming MESSAGE request!
+         */
+        pjsip_rx_data *rdata;
+        pjsip_msg *msg;
+        pjsip_accept_hdr *accept_hdr;
+        pj_status_t status;
+
+        rdata = e->body.tsx_state.src.rdata;
+        msg = rdata->msg_info.msg;
+
+        /* Request MUST have message body, with Content-Type equal to
+         * "text/plain".
+         */
+        if (pjsua_im_accept_pager(rdata, &accept_hdr) == PJ_FALSE) {
+
+            pjsip_hdr hdr_list;
+
+            pj_list_init(&hdr_list);
+            pj_list_push_back(&hdr_list, accept_hdr);
+
+            pjsip_dlg_respond( inv->dlg, rdata, PJSIP_SC_NOT_ACCEPTABLE_HERE, 
+                               NULL, &hdr_list, NULL );
+            PJSUA_UNLOCK();
+            return;
         }
 
-        if (pjsip_inv_end_session(call->inv, st_code, NULL, &tdata)==0) {
-            if (tdata)
-                pjsip_inv_send_msg(call->inv, tdata);
+        /* Respond with 200 first, so that remote doesn't retransmit in case
+         * the UI takes too long to process the message. 
+         */
+        status = pjsip_dlg_respond( inv->dlg, rdata, 200, NULL, NULL, NULL);
+
+        /* Process MESSAGE request */
+        pjsua_im_process_pager(call->index, &inv->dlg->remote.info_str,
+                               &inv->dlg->local.info_str, rdata);
+
+    }
+    else if (tsx->role == PJSIP_ROLE_UAC &&
+             pjsip_method_cmp(&tsx->method, &pjsip_message_method)==0)
+    {
+        /* Handle outgoing pager status */
+        if (tsx->status_code >= 200) {
+            pjsua_im_data *im_data;
+
+            im_data = tsx->mod_data[pjsua_var.mod.id];
+            /* im_data can be NULL if this is typing indication */
+
+            if (im_data && pjsua_var.ua_cfg.cb.on_pager_status) {
+                pjsua_var.ua_cfg.cb.on_pager_status(im_data->call_id,
+                                                    &im_data->to,
+                                                    &im_data->body,
+                                                    im_data->user_data,
+                                                    tsx->status_code,
+                                                    &tsx->status_text);
+            }
         }
     }
-}
-
-
-pj_status_t pjsua_call_init(void)
-{
-    /* Initialize invite session callback. */
-    pjsip_inv_callback inv_cb;
-    pj_status_t status;
-
-    pj_memset(&inv_cb, 0, sizeof(inv_cb));
-    inv_cb.on_state_changed = &pjsua_call_on_state_changed;
-    inv_cb.on_new_session = &pjsua_call_on_forked;
-    inv_cb.on_media_update = &pjsua_call_on_media_update;
-    inv_cb.on_rx_offer = &pjsua_call_on_rx_offer;
-    inv_cb.on_tsx_state_changed = &pjsua_call_on_tsx_state_changed;
-
-
-    /* Initialize invite session module: */
-    status = pjsip_inv_usage_init(pjsua.endpt, &inv_cb);
-    
-    return status;
-}
-
-/**
- * Replace media transport.
- */
-PJ_DEF(pj_status_t) pjsua_set_call_media_transport( unsigned call_index,
-                                                    const pjmedia_sock_info *i,
-                                                    pjmedia_transport *tp)
-{
-    pjsua_call *call = &pjsua.calls[call_index];
-
-    if (i)
-        pj_memcpy(&call->skinfo, i, sizeof(pjmedia_sock_info));
-    
-    if (call->med_tp)
-        (*call->med_tp->op->destroy)(call->med_tp);
-
-    call->med_tp = tp;
-    return PJ_SUCCESS;
-}
+
+
+    PJSUA_UNLOCK();
+}

pjproject/trunk/pjsip/src/pjsua-lib/pjsua_core.c

@@ -18 +18 @@
  */
 #include <pjsua-lib/pjsua.h>
-#include "pjsua_imp.h"
-
-/*
- * pjsua_core.c
+#include <pjsua-lib/pjsua_internal.h>
+
+
+#define THIS_FILE   "pjsua_core.c"
+
+
+/* PJSUA application instance. */
+struct pjsua_data pjsua_var;
+
+
+/* Display error */
+PJ_DEF(void) pjsua_perror( const char *sender, const char *title, 
+                           pj_status_t status)
+{
+    char errmsg[PJ_ERR_MSG_SIZE];
+
+    pj_strerror(status, errmsg, sizeof(errmsg));
+    PJ_LOG(3,(sender, "%s: %s [status=%d]", title, errmsg, status));
+}
+
+
+static void init_data()
+{
+    unsigned i;
+
+    for (i=0; i<PJ_ARRAY_SIZE(pjsua_var.acc); ++i)
+        pjsua_var.acc[i].index = i;
+    
+    for (i=0; i<PJ_ARRAY_SIZE(pjsua_var.tpdata); ++i)
+        pjsua_var.tpdata[i].index = i;
+}
+
+
+
+/*****************************************************************************
+ * This is a very simple PJSIP module, whose sole purpose is to display
+ * incoming and outgoing messages to log. This module will have priority
+ * higher than transport layer, which means:
  *
- * Core application functionalities.
- */
-
-#define THIS_FILE   "pjsua_core.c"
-
-
-/* 
- * Global variable.
- */
-struct pjsua pjsua;
-
-
-/* 
- * Default local URI, if none is specified in cmd-line 
- */
-#define PJSUA_LOCAL_URI     "<sip:user@127.0.0.1>"
-
-
-
-/*
- * Init default application parameters.
- */
-PJ_DEF(void) pjsua_default_config(pjsua_config *cfg)
-{
-    unsigned i;
-
-    pj_memset(cfg, 0, sizeof(pjsua_config));
-
-    cfg->thread_cnt = 1;
-    cfg->media_has_ioqueue = 1;
-    cfg->media_thread_cnt = 1;
-    cfg->udp_port = 5060;
-    cfg->start_rtp_port = 4000;
-    cfg->msg_logging = PJ_TRUE;
-    cfg->max_calls = 4;
-    cfg->conf_ports = 0;
-
-#if defined(PJ_DARWINOS) && PJ_DARWINOS!=0
-    pjsua.clock_rate = 44100;
-#endif
-
-    cfg->complexity = 10;
-    cfg->quality = 10;
+ *  - incoming messages will come to this module first before reaching
+ *    transaction layer.
+ *
+ *  - outgoing messages will come to this module last, after the message
+ *    has been 'printed' to contiguous buffer by transport layer and
+ *    appropriate transport instance has been decided for this message.
+ *
+ */
+
+/* Notification on incoming messages */
+static pj_bool_t logging_on_rx_msg(pjsip_rx_data *rdata)
+{
+    PJ_LOG(4,(THIS_FILE, "RX %d bytes %s from %s:%d:\n"
+                         "%s\n"
+                         "--end msg--",
+                         rdata->msg_info.len,
+                         pjsip_rx_data_get_info(rdata),
+                         rdata->pkt_info.src_name,
+                         rdata->pkt_info.src_port,
+                         rdata->msg_info.msg_buf));
     
-    cfg->auto_answer = 100;
-    cfg->uas_duration = 3600;
-
-    /* Default logging settings: */
-    cfg->log_level = 5;
-    cfg->app_log_level = 4;
-    cfg->log_decor =  PJ_LOG_HAS_SENDER | PJ_LOG_HAS_TIME | 
-                      PJ_LOG_HAS_MICRO_SEC | PJ_LOG_HAS_NEWLINE;
-
-
-    /* Also init logging settings in pjsua.config, because log
-     * may be written before pjsua_init() is called.
+    /* Always return false, otherwise messages will not get processed! */
+    return PJ_FALSE;
+}
+
+/* Notification on outgoing messages */
+static pj_status_t logging_on_tx_msg(pjsip_tx_data *tdata)
+{
+    
+    /* Important note:
+     *  tp_info field is only valid after outgoing messages has passed
+     *  transport layer. So don't try to access tp_info when the module
+     *  has lower priority than transport layer.
      */
-    pjsua.config.log_level = 5;
-    pjsua.config.app_log_level = 4;
-
-
-    /* Init accounts: */
-    for (i=0; i<PJ_ARRAY_SIZE(pjsua.acc); ++i) {
-        cfg->acc_config[i].reg_timeout = 55;
-    }
-
-}
-
-
-#define strncpy_with_null(dst,src,len)  \
-do { \
-    strncpy(dst, src, len); \
-    dst[len-1] = '\0'; \
-} while (0)
-
-
-
-PJ_DEF(pj_status_t) pjsua_test_config( const pjsua_config *cfg,
-                                       char *errmsg,
-                                       int len)
-{
-    unsigned i;
-
-    /* If UDP port is zero, then sip_host and sip_port must be specified */
-    if (cfg->udp_port == 0) {
-        if (cfg->sip_host.slen==0 || cfg->sip_port==0) {
-            strncpy_with_null(errmsg, 
-                              "sip_host and sip_port must be specified",
-                              len);
-            return -1;
-        }
-    }
-
-    if (cfg->max_calls < 1) {
-        strncpy_with_null(errmsg, 
-                          "max_calls needs to be at least 1",
-                          len);
-        return -1;
-    }
-
-    /* STUN */
-    if (cfg->stun_srv1.slen || cfg->stun_port1 || cfg->stun_port2 || 
-        cfg->stun_srv2.slen) 
-    {
-        if (cfg->stun_port1 == 0) {
-            strncpy_with_null(errmsg, "stun_port1 required", len);
-            return -1;
-        }
-        if (cfg->stun_srv1.slen == 0) {
-            strncpy_with_null(errmsg, "stun_srv1 required", len);
-            return -1;
-        }
-        if (cfg->stun_port2 == 0) {
-            strncpy_with_null(errmsg, "stun_port2 required", len);
-            return -1;
-        }
-        if (cfg->stun_srv2.slen == 0) {
-            strncpy_with_null(errmsg, "stun_srv2 required", len);
-            return -1;
-        }
-    }
-
-    /* Verify accounts */
-    for (i=0; i<cfg->acc_cnt; ++i) {
-        const pjsua_acc_config *acc_cfg = &cfg->acc_config[i];
-        unsigned j;
-
-        if (acc_cfg->id.slen == 0) {
-            strncpy_with_null(errmsg, "missing account ID", len);
-            return -1;
-        }
-
-        if (acc_cfg->id.slen == 0) {
-            strncpy_with_null(errmsg, "missing registrar URI", len);
-            return -1;
-        }
-
-        if (acc_cfg->reg_timeout == 0) {
-            strncpy_with_null(errmsg, "missing registration timeout", len);
-            return -1;
-        }
-
-
-        for (j=0; j<acc_cfg->cred_count; ++j) {
-
-            if (acc_cfg->cred_info[j].scheme.slen == 0) {
-                strncpy_with_null(errmsg, "missing auth scheme in account", 
-                                  len);
-                return -1;
-            }
-
-            if (acc_cfg->cred_info[j].realm.slen == 0) {
-                strncpy_with_null(errmsg, "missing realm in account", len);
-                return -1;
-            }
-
-            if (acc_cfg->cred_info[j].username.slen == 0) {
-                strncpy_with_null(errmsg, "missing username in account", len);
-                return -1;
-            }
-
-        }
-    }
-
+
+    PJ_LOG(4,(THIS_FILE, "TX %d bytes %s to %s:%d:\n"
+                         "%s\n"
+                         "--end msg--",
+                         (tdata->buf.cur - tdata->buf.start),
+                         pjsip_tx_data_get_info(tdata),
+                         tdata->tp_info.dst_name,
+                         tdata->tp_info.dst_port,
+                         tdata->buf.start));
+
+    /* Always return success, otherwise message will not get sent! */
     return PJ_SUCCESS;
 }
 
+/* The module instance. */
+static pjsip_module pjsua_msg_logger = 
+{
+    NULL, NULL,                         /* prev, next.          */
+    { "mod-pjsua-log", 13 },            /* Name.                */
+    -1,                                 /* Id                   */
+    PJSIP_MOD_PRIORITY_TRANSPORT_LAYER-1,/* Priority            */
+    NULL,                               /* load()               */
+    NULL,                               /* start()              */
+    NULL,                               /* stop()               */
+    NULL,                               /* unload()             */
+    &logging_on_rx_msg,                 /* on_rx_request()      */
+    &logging_on_rx_msg,                 /* on_rx_response()     */
+    &logging_on_tx_msg,                 /* on_tx_request.       */
+    &logging_on_tx_msg,                 /* on_tx_response()     */
+    NULL,                               /* on_tsx_state()       */
+
+};
+
+
+/*****************************************************************************
+ * These two functions are the main callbacks registered to PJSIP stack
+ * to receive SIP request and response messages that are outside any
+ * dialogs and any transactions.
+ */
 
 /*
@@ -202 +142 @@
 static pj_bool_t mod_pjsua_on_rx_request(pjsip_rx_data *rdata)
 {
+    pj_bool_t processed = PJ_FALSE;
+
+    PJSUA_LOCK();
 
     if (rdata->msg_info.msg->line.req.method.id == PJSIP_INVITE_METHOD) {
 
-        return pjsua_call_on_incoming(rdata);
-    }
-
-    return PJ_FALSE;
+        processed = pjsua_call_on_incoming(rdata);
+    }
+
+    PJSUA_UNLOCK();
+
+    return processed;
 }
 
@@ -230 +175 @@
 
 
-static int PJ_THREAD_FUNC pjsua_poll(void *arg)
-{
-    pj_status_t last_err = 0;
-
-    PJ_UNUSED_ARG(arg);
-
-    do {
-        pj_time_val timeout = { 0, 10 };
-        pj_status_t status;
-        
-        status = pjsip_endpt_handle_events (pjsua.endpt, &timeout);
-        if (status != PJ_SUCCESS && status != last_err) {
-            last_err = status;
-            pjsua_perror(THIS_FILE, "handle_events() returned error", status);
-        }
-    } while (!pjsua.quit_flag);
-
-    return 0;
-}
-
-/**
- * Poll pjsua.
- */
-PJ_DECL(int) pjsua_handle_events(unsigned msec_timeout)
-{
-    unsigned count = 0;
-    pj_time_val tv;
+/*****************************************************************************
+ * Logging.
+ */
+
+/* Log callback */
+static void log_writer(int level, const char *buffer, int len)
+{
+    /* Write to stdout, file, and application callback. */
+
+    if (level <= (int)pjsua_var.log_cfg.console_level)
+        pj_log_write(level, buffer, len);
+
+    if (pjsua_var.log_file) {
+        pj_ssize_t size = len;
+        pj_file_write(pjsua_var.log_file, buffer, &size);
+    }
+
+    if (pjsua_var.log_cfg.cb)
+        (*pjsua_var.log_cfg.cb)(level, buffer, len);
+}
+
+
+/*
+ * Application can call this function at any time (after pjsua_create(), of
+ * course) to change logging settings.
+ */
+PJ_DEF(pj_status_t) pjsua_reconfigure_logging(const pjsua_logging_config *cfg)
+{
     pj_status_t status;
 
-    tv.sec = 0;
-    tv.msec = msec_timeout;
-    pj_time_val_normalize(&tv);
-
-    status = pjsip_endpt_handle_events2(pjsua.endpt, &tv, &count);
-    if (status != PJ_SUCCESS)
-        return -status;
-
-    return count;
-}
-
-
-#define pjsua_has_stun()    (pjsua.config.stun_port1 && \
-                             pjsua.config.stun_port2)
-
-
-/*
- * Create and initialize SIP socket (and possibly resolve public
- * address via STUN, depending on config).
- */
-static pj_status_t create_sip_udp_sock(int port,
-                                       pj_sock_t *p_sock,
-                                       pj_sockaddr_in *p_pub_addr)
-{
-    pj_sock_t sock;
-    pj_status_t status;
-
-    status = pj_sock_socket(PJ_AF_INET, PJ_SOCK_DGRAM, 0, &sock);
-    if (status != PJ_SUCCESS) {
-        pjsua_perror(THIS_FILE, "socket() error", status);
-        return status;
-    }
-
-    status = pj_sock_bind_in(sock, 0, (pj_uint16_t)port);
-    if (status != PJ_SUCCESS) {
-        pjsua_perror(THIS_FILE, "bind() error", status);
-        pj_sock_close(sock);
-        return status;
-    }
-
-    if (pjsua_has_stun()) {
-        status = pj_stun_get_mapped_addr(&pjsua.cp.factory, 1, &sock,
-                                         &pjsua.config.stun_srv1, 
-                                         pjsua.config.stun_port1,
-                                         &pjsua.config.stun_srv2, 
-                                         pjsua.config.stun_port2,
-                                         p_pub_addr);
+    /* Save config. */
+    pjsua_logging_config_dup(pjsua_var.pool, &pjsua_var.log_cfg, cfg);
+
+    /* Redirect log function to ours */
+    pj_log_set_log_func( &log_writer );
+
+    /* Close existing file, if any */
+    if (pjsua_var.log_file) {
+        pj_file_close(pjsua_var.log_file);
+        pjsua_var.log_file = NULL;
+    }
+
+    /* If output log file is desired, create the file: */
+    if (pjsua_var.log_cfg.log_filename.slen) {
+
+        status = pj_file_open(pjsua_var.pool, 
+                              pjsua_var.log_cfg.log_filename.ptr,
+                              PJ_O_WRONLY, 
+                              &pjsua_var.log_file);
+
         if (status != PJ_SUCCESS) {
-            pjsua_perror(THIS_FILE, "STUN resolve error", status);
-            pj_sock_close(sock);
+            pjsua_perror(THIS_FILE, "Error creating log file", status);
             return status;
         }
-
-    } else {
-
-        const pj_str_t *hostname = pj_gethostname();
-        struct pj_hostent he;
-
-        status = pj_gethostbyname(hostname, &he);
-        if (status != PJ_SUCCESS) {
-            pjsua_perror(THIS_FILE, "Unable to resolve local host", status);
-            pj_sock_close(sock);
-            return status;
-        }
-
-        pj_memset(p_pub_addr, 0, sizeof(pj_sockaddr_in));
-        p_pub_addr->sin_family = PJ_AF_INET;
-        p_pub_addr->sin_port = pj_htons((pj_uint16_t)port);
-        p_pub_addr->sin_addr = *(pj_in_addr*)he.h_addr;
-    }
-
-    *p_sock = sock;
+    }
+
+    /* Unregister msg logging if it's previously registered */
+    if (pjsua_msg_logger.id >= 0) {
+        pjsip_endpt_unregister_module(pjsua_var.endpt, &pjsua_msg_logger);
+        pjsua_msg_logger.id = -1;
+    }
+
+    /* Enable SIP message logging */
+    if (pjsua_var.log_cfg.msg_logging)
+        pjsip_endpt_register_module(pjsua_var.endpt, &pjsua_msg_logger);
+
+
     return PJ_SUCCESS;
 }
 
 
-/* 
- * Create RTP and RTCP socket pair, and possibly resolve their public
- * address via STUN.
- */
-static pj_status_t create_rtp_rtcp_sock(pjmedia_sock_info *skinfo)
-{
-    enum { 
-        RTP_RETRY = 100
-    };
-    int i;
-    static pj_uint16_t rtp_port;
-    pj_sockaddr_in mapped_addr[2];
-    pj_status_t status = PJ_SUCCESS;
-    pj_sock_t sock[2];
-
-    if (rtp_port == 0)
-        rtp_port = (pj_uint16_t)pjsua.config.start_rtp_port;
-
-    for (i=0; i<2; ++i)
-        sock[i] = PJ_INVALID_SOCKET;
-
-
-    /* Loop retry to bind RTP and RTCP sockets. */
-    for (i=0; i<RTP_RETRY; ++i, rtp_port += 2) {
-
-        /* Create and bind RTP socket. */
-        status = pj_sock_socket(PJ_AF_INET, PJ_SOCK_DGRAM, 0, &sock[0]);
-        if (status != PJ_SUCCESS) {
-            pjsua_perror(THIS_FILE, "socket() error", status);
-            return status;
-        }
-
-        status = pj_sock_bind_in(sock[0], 0, rtp_port);
-        if (status != PJ_SUCCESS) {
-            pj_sock_close(sock[0]); 
-            sock[0] = PJ_INVALID_SOCKET;
-            continue;
-        }
-
-        /* Create and bind RTCP socket. */
-        status = pj_sock_socket(PJ_AF_INET, PJ_SOCK_DGRAM, 0, &sock[1]);
-        if (status != PJ_SUCCESS) {
-            pjsua_perror(THIS_FILE, "socket() error", status);
-            pj_sock_close(sock[0]);
-            return status;
-        }
-
-        status = pj_sock_bind_in(sock[1], 0, (pj_uint16_t)(rtp_port+1));
-        if (status != PJ_SUCCESS) {
-            pj_sock_close(sock[0]); 
-            sock[0] = PJ_INVALID_SOCKET;
-
-            pj_sock_close(sock[1]); 
-            sock[1] = PJ_INVALID_SOCKET;
-            continue;
-        }
-
-        /*
-         * If we're configured to use STUN, then find out the mapped address,
-         * and make sure that the mapped RTCP port is adjacent with the RTP.
-         */
-        if (pjsua_has_stun()) {
-            status=pj_stun_get_mapped_addr(&pjsua.cp.factory, 2, sock,
-                                           &pjsua.config.stun_srv1, 
-                                           pjsua.config.stun_port1,
-                                           &pjsua.config.stun_srv2, 
-                                           pjsua.config.stun_port2,
-                                           mapped_addr);
-            if (status != PJ_SUCCESS) {
-                pjsua_perror(THIS_FILE, "STUN resolve error", status);
-                goto on_error;
-            }
-
-            if (pj_ntohs(mapped_addr[1].sin_port) == 
-                pj_ntohs(mapped_addr[0].sin_port)+1)
-            {
-                /* Success! */
-                break;
-            }
-
-            pj_sock_close(sock[0]); 
-            sock[0] = PJ_INVALID_SOCKET;
-
-            pj_sock_close(sock[1]); 
-            sock[1] = PJ_INVALID_SOCKET;
-
-        } else {
-            const pj_str_t *hostname;
-            pj_sockaddr_in addr;
-
-            /* Get local IP address. */
-            hostname = pj_gethostname();
-
-            pj_memset( &addr, 0, sizeof(addr));
-            addr.sin_family = PJ_AF_INET;
-            status = pj_sockaddr_in_set_str_addr( &addr, hostname);
-            if (status != PJ_SUCCESS) {
-                pjsua_perror(THIS_FILE, "Unresolvable local hostname", 
-                             status);
-                goto on_error;
-            }
-
-            for (i=0; i<2; ++i)
-                pj_memcpy(&mapped_addr[i], &addr, sizeof(addr));
-
-            mapped_addr[0].sin_port=pj_htons((pj_uint16_t)rtp_port);
-            mapped_addr[1].sin_port=pj_htons((pj_uint16_t)(rtp_port+1));
-            break;
-        }
-    }
-
-    if (sock[0] == PJ_INVALID_SOCKET) {
-        PJ_LOG(1,(THIS_FILE, 
-                  "Unable to find appropriate RTP/RTCP ports combination"));
-        goto on_error;
-    }
-
-
-    skinfo->rtp_sock = sock[0];
-    pj_memcpy(&skinfo->rtp_addr_name, 
-              &mapped_addr[0], sizeof(pj_sockaddr_in));
-
-    skinfo->rtcp_sock = sock[1];
-    pj_memcpy(&skinfo->rtcp_addr_name, 
-              &mapped_addr[1], sizeof(pj_sockaddr_in));
-
-    PJ_LOG(4,(THIS_FILE, "RTP socket reachable at %s:%d",
-              pj_inet_ntoa(skinfo->rtp_addr_name.sin_addr), 
-              pj_ntohs(skinfo->rtp_addr_name.sin_port)));
-    PJ_LOG(4,(THIS_FILE, "RTCP socket reachable at %s:%d",
-              pj_inet_ntoa(skinfo->rtcp_addr_name.sin_addr), 
-              pj_ntohs(skinfo->rtcp_addr_name.sin_port)));
-
-    rtp_port += 2;
+/*****************************************************************************
+ * PJSUA Base API.
+ */
+
+/* Worker thread function. */
+static int worker_thread(void *arg)
+{
+    enum { TIMEOUT = 10 };
+
+    PJ_UNUSED_ARG(arg);
+
+    while (!pjsua_var.thread_quit_flag) {
+        int count;
+
+        count = pjsua_handle_events(TIMEOUT);
+        if (count < 0)
+            pj_thread_sleep(TIMEOUT);
+    }
+
+    return 0;
+}
+
+
+/*
+ * Instantiate pjsua application.
+ */
+PJ_DEF(pj_status_t) pjsua_create(void)
+{
+    pj_status_t status;
+
+    /* Init pjsua data */
+    init_data();
+
+    /* Set default logging settings */
+    pjsua_logging_config_default(&pjsua_var.log_cfg);
+
+    /* Init PJLIB: */
+    status = pj_init();
+    PJ_ASSERT_RETURN(status == PJ_SUCCESS, status);
+
+
+    /* Init PJLIB-UTIL: */
+    status = pjlib_util_init();
+    PJ_ASSERT_RETURN(status == PJ_SUCCESS, status);
+
+
+    /* Init caching pool. */
+    pj_caching_pool_init(&pjsua_var.cp, &pj_pool_factory_default_policy, 0);
+
+    /* Create memory pool for application. */
+    pjsua_var.pool = pjsua_pool_create("pjsua", 4000, 4000);
+    
+    PJ_ASSERT_RETURN(pjsua_var.pool, PJ_ENOMEM);
+
+    /* Create mutex */
+    status = pj_mutex_create_recursive(pjsua_var.pool, "pjsua", 
+                                       &pjsua_var.mutex);
+    if (status != PJ_SUCCESS) {
+        pjsua_perror(THIS_FILE, "Unable to create mutex", status);
+        return status;
+    }
+
+    /* Must create SIP endpoint to initialize SIP parser. The parser
+     * is needed for example when application needs to call pjsua_verify_url().
+     */
+    status = pjsip_endpt_create(&pjsua_var.cp.factory, 
+                                pj_gethostname()->ptr, 
+                                &pjsua_var.endpt);
+    PJ_ASSERT_RETURN(status == PJ_SUCCESS, status);
+
+
     return PJ_SUCCESS;
-
-on_error:
-    for (i=0; i<2; ++i) {
-        if (sock[i] != PJ_INVALID_SOCKET)
-            pj_sock_close(sock[i]);
-    }
-    return status;
-}
-
-
-
-/**
- * Create pjsua application.
- * This initializes pjlib/pjlib-util, and creates memory pool factory to
- * be used by application.
- */
-PJ_DEF(pj_status_t) pjsua_create(void)
-{
+}
+
+
+/*
+ * Initialize pjsua with the specified settings. All the settings are 
+ * optional, and the default values will be used when the config is not
+ * specified.
+ */
+PJ_DEF(pj_status_t) pjsua_init( const pjsua_config *ua_cfg,
+                                const pjsua_logging_config *log_cfg,
+                                const pjsua_media_config *media_cfg)
+{
+    pjsua_config         default_cfg;
+    pjsua_media_config   default_media_cfg;
     pj_status_t status;
 
-    /* Init PJLIB: */
-
-    status = pj_init();
-    if (status != PJ_SUCCESS) {
-        pjsua_perror(THIS_FILE, "pj_init() error", status);
-        return status;
-    }
-
-    /* Init PJLIB-UTIL: */
-
-    status = pjlib_util_init();
-    if (status != PJ_SUCCESS) {
-        pjsua_perror(THIS_FILE, "pjlib_util_init() error", status);
-        return status;
-    }
-
-    /* Init memory pool: */
-
-    /* Init caching pool. */
-    pj_caching_pool_init(&pjsua.cp, &pj_pool_factory_default_policy, 0);
-
-    /* Create memory pool for application. */
-    pjsua.pool = pj_pool_create(&pjsua.cp.factory, "pjsua", 4000, 4000, NULL);
-
-    /* Must create endpoint to initialize SIP parser. */
-    /* Create global endpoint: */
-
-    status = pjsip_endpt_create(&pjsua.cp.factory, 
-                                pj_gethostname()->ptr, 
-                                &pjsua.endpt);
-    if (status != PJ_SUCCESS) {
-        pjsua_perror(THIS_FILE, "Unable to create SIP endpoint", status);
-        return status;
-    }
-
-    /* Must create media endpoint too */
-    status = pjmedia_endpt_create(&pjsua.cp.factory, 
-                                  pjsua.config.media_has_ioqueue? NULL :
-                                       pjsip_endpt_get_ioqueue(pjsua.endpt), 
-                                  pjsua.config.media_thread_cnt,
-                                  &pjsua.med_endpt);
-    if (status != PJ_SUCCESS) {
-        pjsua_perror(THIS_FILE, 
-                     "Media stack initialization has returned error", 
-                     status);
-        return status;
-    }
-
-
-    return PJ_SUCCESS;
-}
-
-
-
-/*
- * Init media.
- */
-static pj_status_t init_media(void)
-{
-    int i;
-    unsigned options;
-    pj_str_t codec_id;
-    pj_status_t status;
-
-    /* Register all codecs */
-#if PJMEDIA_HAS_SPEEX_CODEC
-    /* Register speex. */
-    status = pjmedia_codec_speex_init(pjsua.med_endpt, 
-                                      PJMEDIA_SPEEX_NO_UWB,
-                                      pjsua.config.quality, 
-                                      pjsua.config.complexity );
-    if (status != PJ_SUCCESS) {
-        pjsua_perror(THIS_FILE, "Error initializing Speex codec",
-                     status);
-        return status;
-    }
-
-    /* Set "speex/16000/1" to have highest priority */
-    codec_id = pj_str("speex/16000/1");
-    pjmedia_codec_mgr_set_codec_priority( 
-        pjmedia_endpt_get_codec_mgr(pjsua.med_endpt),
-        &codec_id, 
-        PJMEDIA_CODEC_PRIO_HIGHEST);
-
-#endif /* PJMEDIA_HAS_SPEEX_CODEC */
-
-#if PJMEDIA_HAS_GSM_CODEC
-    /* Register GSM */
-    status = pjmedia_codec_gsm_init(pjsua.med_endpt);
-    if (status != PJ_SUCCESS) {
-        pjsua_perror(THIS_FILE, "Error initializing GSM codec",
-                     status);
-        return status;
-    }
-#endif /* PJMEDIA_HAS_GSM_CODEC */
-
-#if PJMEDIA_HAS_G711_CODEC
-    /* Register PCMA and PCMU */
-    status = pjmedia_codec_g711_init(pjsua.med_endpt);
-    if (status != PJ_SUCCESS) {
-        pjsua_perror(THIS_FILE, "Error initializing G711 codec",
-                     status);
-        return status;
-    }
-#endif  /* PJMEDIA_HAS_G711_CODEC */
-
-#if PJMEDIA_HAS_L16_CODEC
-    /* Register L16 family codecs, but disable all */
-    status = pjmedia_codec_l16_init(pjsua.med_endpt, 0);
-    if (status != PJ_SUCCESS) {
-        pjsua_perror(THIS_FILE, "Error initializing L16 codecs",
-                     status);
-        return status;
-    }
-
-    /* Disable ALL L16 codecs */
-    codec_id = pj_str("L16");
-    pjmedia_codec_mgr_set_codec_priority( 
-        pjmedia_endpt_get_codec_mgr(pjsua.med_endpt),
-        &codec_id, 
-        PJMEDIA_CODEC_PRIO_DISABLED);
-
-#endif  /* PJMEDIA_HAS_L16_CODEC */
-
-
-    /* Enable those codecs that user put with "--add-codec", and move
-     * the priority to top
-     */
-    for (i=0; i<(int)pjsua.config.codec_cnt; ++i) {
-        pjmedia_codec_mgr_set_codec_priority( 
-            pjmedia_endpt_get_codec_mgr(pjsua.med_endpt),
-            &pjsua.config.codec_arg[i], 
-            PJMEDIA_CODEC_PRIO_HIGHEST);
-    }
-
-
-    /* Init options for conference bridge. */
-    options = PJMEDIA_CONF_NO_DEVICE;
-
-    /* Calculate maximum number of ports, if it's not specified */
-    if (pjsua.config.conf_ports == 0) {
-        pjsua.config.conf_ports = 3 * pjsua.config.max_calls;
-    }
-
-    /* Init conference bridge. */
-    pjsua.clock_rate = pjsua.config.clock_rate ? pjsua.config.clock_rate : 16000;
-    pjsua.samples_per_frame = pjsua.clock_rate * 10 / 1000;
-    status = pjmedia_conf_create(pjsua.pool, 
-                                 pjsua.config.conf_ports, 
-                                 pjsua.clock_rate, 
-                                 1, /* mono */
-                                 pjsua.samples_per_frame, 
-                                 16, 
-                                 options,
-                                 &pjsua.mconf);
-    if (status != PJ_SUCCESS) {
-        pjsua_perror(THIS_FILE, 
-                     "Media stack initialization has returned error", 
-                     status);
-        return status;
-    }
-
-    if (pjsua.config.null_audio == PJ_FALSE) {
-        pjmedia_port *conf_port;
-
-        /* Create sound device port */
-        status = pjmedia_snd_port_create(pjsua.pool, 
-                                         pjsua.config.snd_capture_id,
-                                         pjsua.config.snd_player_id, 
-                                         pjsua.clock_rate, 1 /* mono */,
-                                         pjsua.samples_per_frame, 16,
-                                         0, &pjsua.snd_port);
-        if (status != PJ_SUCCESS) {
-            pjsua_perror(THIS_FILE, "Unable to create sound device", status);
-            return status;
-        }
-
-        /* Get the port interface of the conference bridge */
-        conf_port = pjmedia_conf_get_master_port(pjsua.mconf);
-
-        /* Connect conference port interface to sound port */
-        pjmedia_snd_port_connect( pjsua.snd_port, conf_port);
-
-    } else {
-        pjmedia_port *null_port, *conf_port;
-
-        /* Create NULL port */
-        status = pjmedia_null_port_create(pjsua.pool, pjsua.clock_rate,
-                                          1, pjsua.samples_per_frame, 16,
-                                          &null_port);
-        if (status != PJ_SUCCESS) {
-            pjsua_perror(THIS_FILE, "Unable to create NULL port", status);
-            return status;
-        }
-
-        /* Get the port interface of the conference bridge */
-        conf_port = pjmedia_conf_get_master_port(pjsua.mconf);
-
-        /* Create master port to control conference bridge's clock */
-        status = pjmedia_master_port_create(pjsua.pool, null_port, conf_port,
-                                            0, &pjsua.master_port);
-        if (status != PJ_SUCCESS) {
-            pjsua_perror(THIS_FILE, "Unable to create master port", status);
-            return status;
-        }
-    }
-
-    /* Create WAV file player if required: */
-
-    if (pjsua.config.wav_file.slen) {
-
-        status = pjsua_player_create(&pjsua.config.wav_file, NULL);
-        if (status != PJ_SUCCESS) {
-            pjsua_perror(THIS_FILE, "Unable to create file player", 
-                         status);
-            return status;
-        }
-    }
-
-
-    return PJ_SUCCESS;
-}
-
-
-/*
- * Copy account configuration.
- */
-static void copy_acc_config(pj_pool_t *pool,
-                            pjsua_acc_config *dst_acc,
-                            const pjsua_acc_config *src_acc)
-{
-    unsigned j;
-
-    pj_memcpy(dst_acc, src_acc, sizeof(pjsua_acc_config));
-
-    pj_strdup_with_null(pool, &dst_acc->id, &src_acc->id);
-    pj_strdup_with_null(pool, &dst_acc->reg_uri, &src_acc->reg_uri);
-    pj_strdup_with_null(pool, &dst_acc->contact, &src_acc->contact);
-    pj_strdup_with_null(pool, &dst_acc->proxy, &src_acc->proxy);
-
-    for (j=0; j<src_acc->cred_count; ++j) {
-        pj_strdup_with_null(pool, &dst_acc->cred_info[j].realm, 
-                            &src_acc->cred_info[j].realm);
-        pj_strdup_with_null(pool, &dst_acc->cred_info[j].scheme, 
-                            &src_acc->cred_info[j].scheme);
-        pj_strdup_with_null(pool, &dst_acc->cred_info[j].username, 
-                            &src_acc->cred_info[j].username);
-        pj_strdup_with_null(pool, &dst_acc->cred_info[j].data, 
-                            &src_acc->cred_info[j].data);
-    }
-}
-
-
-/*
- * Copy configuration.
- */
-void pjsua_copy_config( pj_pool_t *pool, pjsua_config *dst, 
-                        const pjsua_config *src)
-{
-    unsigned i;
-
-    /* Plain memcpy */
-    pj_memcpy(dst, src, sizeof(pjsua_config));
-
-    /* Duplicate strings */
-    pj_strdup_with_null(pool, &dst->sip_host, &src->sip_host);
-    pj_strdup_with_null(pool, &dst->stun_srv1, &src->stun_srv1);
-    pj_strdup_with_null(pool, &dst->stun_srv2, &src->stun_srv2);
-    pj_strdup_with_null(pool, &dst->wav_file, &src->wav_file);
-    
-    for (i=0; i<src->codec_cnt; ++i) {
-        pj_strdup_with_null(pool, &dst->codec_arg[i], &src->codec_arg[i]);
-    }
-
-    pj_strdup_with_null(pool, &dst->outbound_proxy, &src->outbound_proxy);
-    //pj_strdup_with_null(pool, &dst->uri_to_call, &src->uri_to_call);
-
-    for (i=0; i<src->acc_cnt; ++i) {
-        pjsua_acc_config *dst_acc = &dst->acc_config[i];
-        const pjsua_acc_config *src_acc = &src->acc_config[i];
-        copy_acc_config(pool, dst_acc, src_acc);
-    }
-
-    pj_strdup_with_null(pool, &dst->log_filename, &src->log_filename);
-
-    for (i=0; i<src->buddy_cnt; ++i) {
-        pj_strdup_with_null(pool, &dst->buddy_uri[i], &src->buddy_uri[i]);
-    }
-}
-
-
-/*****************************************************************************
- * Console application custom logging:
- */
-
-
-static void log_writer(int level, const char *buffer, int len)
-{
-    /* Write to both stdout and file. */
-
-    if (level <= (int)pjsua.config.app_log_level)
-        pj_log_write(level, buffer, len);
-
-    if (pjsua.log_file) {
-        fwrite(buffer, len, 1, pjsua.log_file);
-        fflush(pjsua.log_file);
-    }
-}
-
-
-static pj_status_t logging_init()
-{
-    /* Redirect log function to ours */
-
-    pj_log_set_log_func( &log_writer );
-
-    /* If output log file is desired, create the file: */
-
-    if (pjsua.config.log_filename.slen) {
-        pjsua.log_file = fopen(pjsua.config.log_filename.ptr, "wt");
-        if (pjsua.log_file == NULL) {
-            PJ_LOG(1,(THIS_FILE, "Unable to open log file %s", 
-                      pjsua.config.log_filename.ptr));   
-            return -1;
-        }
-    }
-
-    /* Enable SIP message logging */
-    if (pjsua.config.msg_logging)
-        pjsip_endpt_register_module(pjsua.endpt, &pjsua_msg_logger);
-
-    return PJ_SUCCESS;
-}
-
-
-static void logging_shutdown(void)
-{
-    /* Close logging file, if any: */
-
-    if (pjsua.log_file) {
-        fclose(pjsua.log_file);
-        pjsua.log_file = NULL;
-    }
-}
-
-
-/*
- * Initialize pjsua application.
- * This will initialize all libraries, create endpoint instance, and register
- * pjsip modules.
- */
-PJ_DECL(pj_status_t) pjsua_init(const pjsua_config *cfg,
-                                const pjsua_callback *cb)
-{
-    char errmsg[80];
-    unsigned i;
-    pj_status_t status;
-
-
-    /* Init accounts: */
-    for (i=0; i<PJ_ARRAY_SIZE(pjsua.acc); ++i) {
-        pjsua.acc[i].index = i;
-        pjsua.acc[i].online_status = PJ_TRUE;
-        pj_list_init(&pjsua.acc[i].route_set);
-        pj_list_init(&pjsua.acc[i].pres_srv_list);
-    }
-
-    /* Init call array: */
-    for (i=0; i<PJ_ARRAY_SIZE(pjsua.calls); ++i) {
-        pjsua.calls[i].index = i;
-        pjsua.calls[i].refresh_tm._timer_id = -1;
-        pjsua.calls[i].hangup_tm._timer_id = -1;
-        pjsua.calls[i].conf_slot = 0;
-    }
-
-    /* Init buddies array */
-    for (i=0; i<PJ_ARRAY_SIZE(pjsua.buddies); ++i) {
-        pjsua.buddies[i].index = i;
-    }
-
-    /* Copy configuration */
-    pjsua_copy_config(pjsua.pool, &pjsua.config, cfg);
-
-    /* Copy callback */
-    pj_memcpy(&pjsua.cb, cb, sizeof(pjsua_callback));
-
-    /* Test configuration */
-    if (pjsua_test_config(&pjsua.config, errmsg, sizeof(errmsg))) {
-        PJ_LOG(1,(THIS_FILE, "Error in configuration: %s", errmsg));
-        status = -1;
-        goto on_error;
-    }
-
-
-    /* Init PJLIB logging: */
-
-    pj_log_set_level(pjsua.config.log_level);
-    pj_log_set_decor(pjsua.config.log_decor);
-
-    status = logging_init();
-    if (status != PJ_SUCCESS)
-        goto on_error;
-
-
-    /* Create SIP UDP socket */
-    if (pjsua.config.udp_port) {
-
-        status = create_sip_udp_sock( pjsua.config.udp_port,
-                                      &pjsua.sip_sock,
-                                      &pjsua.sip_sock_name);
-        if (status != PJ_SUCCESS)
-            goto on_error;
-    
-        pj_strdup2_with_null(pjsua.pool, &pjsua.config.sip_host,
-                             pj_inet_ntoa(pjsua.sip_sock_name.sin_addr));
-        pjsua.config.sip_port = pj_ntohs(pjsua.sip_sock_name.sin_port);
-
-    } else {
-
-        /* Check that SIP host and port is configured */
-        if (cfg->sip_host.slen == 0 || cfg->sip_port == 0) {
-            PJ_LOG(1,(THIS_FILE, 
-                      "Error: sip_host and sip_port must be specified"));
-            status = PJ_EINVAL;
-            goto on_error;
-        }
-
-        pjsua.sip_sock = PJ_INVALID_SOCKET;
-    }
-
-
-    /* Init media endpoint */
-    status = init_media();
-    if (status != PJ_SUCCESS)
-        goto on_error;
-
-
-    /* Init RTP sockets, only when UDP transport is enabled */
-    for (i=0; pjsua.config.start_rtp_port && i<pjsua.config.max_calls; ++i) {
-        status = create_rtp_rtcp_sock(&pjsua.calls[i].skinfo);
-        if (status != PJ_SUCCESS) {
-            unsigned j;
-            for (j=0; j<i; ++j) {
-                if (pjsua.calls[i].med_tp)
-                    pjsua.calls[i].med_tp->op->destroy(pjsua.calls[i].med_tp);
-            }
-            goto on_error;
-        }
-        status = pjmedia_transport_udp_attach(pjsua.med_endpt, NULL,
-                                              &pjsua.calls[i].skinfo, 0,
-                                              &pjsua.calls[i].med_tp);
-    }
-
-    /* Init PJSIP : */
+
+    /* Create default configurations when the config is not supplied */
+
+    if (ua_cfg == NULL) {
+        pjsua_config_default(&default_cfg);
+        ua_cfg = &default_cfg;
+    }
+
+    if (media_cfg == NULL) {
+        pjsua_media_config_default(&default_media_cfg);
+        media_cfg = &default_media_cfg;
+    }
+
+    /* Initialize logging first so that info/errors can be captured */
+    if (log_cfg) {
+        status = pjsua_reconfigure_logging(log_cfg);
+        PJ_ASSERT_RETURN(status == PJ_SUCCESS, status);
+    }
+
+    /* Init SIP UA: */
 
     /* Initialize transaction layer: */
-
-    status = pjsip_tsx_layer_init_module(pjsua.endpt);
-    if (status != PJ_SUCCESS) {
-        pjsua_perror(THIS_FILE, "Transaction layer initialization error", 
-                     status);
-        goto on_error;
-    }
+    status = pjsip_tsx_layer_init_module(pjsua_var.endpt);
+    PJ_ASSERT_RETURN(status == PJ_SUCCESS, status);
+
 
     /* Initialize UA layer module: */
-
-    status = pjsip_ua_init_module( pjsua.endpt, NULL );
-    if (status != PJ_SUCCESS) {
-        pjsua_perror(THIS_FILE, "UA layer initialization error", status);
-        goto on_error;
-    }
-
-    /* Initialize and register pjsua's application module: */
-
+    status = pjsip_ua_init_module( pjsua_var.endpt, NULL );
+    PJ_ASSERT_RETURN(status == PJ_SUCCESS, status);
+
+
+    /* Initialize and register PJSUA application module. */
     {
-        pjsip_module my_mod = 
+        const pjsip_module mod_initializer = 
         {
         NULL, NULL,                 /* prev, next.                      */
@@ -982 +384 @@
         };
 
-        pjsua.mod = my_mod;
-
-        status = pjsip_endpt_register_module(pjsua.endpt, &pjsua.mod);
-        if (status != PJ_SUCCESS) {
-            pjsua_perror(THIS_FILE, "Unable to register pjsua module", 
-                         status);
-            goto on_error;
+        pjsua_var.mod = mod_initializer;
+
+        status = pjsip_endpt_register_module(pjsua_var.endpt, &pjsua_var.mod);
+        PJ_ASSERT_RETURN(status == PJ_SUCCESS, status);
+    }
+
+    
+
+    /* Initialize PJSUA call subsystem: */
+    status = pjsua_call_subsys_init(ua_cfg);
+    if (status != PJ_SUCCESS)
+        goto on_error;
+
+
+    /* Initialize PJSUA media subsystem */
+    status = pjsua_media_subsys_init(media_cfg);
+    if (status != PJ_SUCCESS)
+        goto on_error;
+
+
+    /* Init core SIMPLE module : */
+    status = pjsip_evsub_init_module(pjsua_var.endpt);
+    PJ_ASSERT_RETURN(status == PJ_SUCCESS, status);
+
+
+    /* Init presence module: */
+    status = pjsip_pres_init_module( pjsua_var.endpt, pjsip_evsub_instance());
+    PJ_ASSERT_RETURN(status == PJ_SUCCESS, status);
+
+
+    /* Init xfer/REFER module */
+    status = pjsip_xfer_init_module( pjsua_var.endpt );
+    PJ_ASSERT_RETURN(status == PJ_SUCCESS, status);
+
+    /* Init pjsua presence handler: */
+    status = pjsua_pres_init();
+    if (status != PJ_SUCCESS)
+        goto on_error;
+
+    /* Init out-of-dialog MESSAGE request handler. */
+    status = pjsua_im_init();
+    if (status != PJ_SUCCESS)
+        goto on_error;
+
+    /* Start worker thread if needed. */
+    if (pjsua_var.ua_cfg.thread_cnt) {
+        unsigned i;
+
+        if (pjsua_var.ua_cfg.thread_cnt > PJ_ARRAY_SIZE(pjsua_var.thread))
+            pjsua_var.ua_cfg.thread_cnt = PJ_ARRAY_SIZE(pjsua_var.thread);
+
+        for (i=0; i<pjsua_var.ua_cfg.thread_cnt; ++i) {
+            status = pj_thread_create(pjsua_var.pool, "pjsua", &worker_thread,
+                                      NULL, 0, 0, &pjsua_var.thread[i]);
+            if (status != PJ_SUCCESS)
+                goto on_error;
         }
     }
 
-    /* Initialize invite session module: */
-
-    status = pjsua_call_init();
-    if (status != PJ_SUCCESS) {
-        pjsua_perror(THIS_FILE, "Invite usage initialization error", 
-                     status);
-        goto on_error;
-    }
-
-    /* Init core SIMPLE module : */
-
-    pjsip_evsub_init_module(pjsua.endpt);
-
-    /* Init presence module: */
-
-    pjsip_pres_init_module( pjsua.endpt, pjsip_evsub_instance());
-
-    /* Init xfer/REFER module */
-
-    pjsip_xfer_init_module( pjsua.endpt );
-
-    /* Init pjsua presence handler: */
-
-    pjsua_pres_init();
-
-    /* Init out-of-dialog MESSAGE request handler. */
-
-    pjsua_im_init();
-
-
-    /* Done. */
+    /* Done! */
+
+    PJ_LOG(3,(THIS_FILE, "pjsua version %s for %s initialized", 
+                         PJ_VERSION, PJ_OS_NAME));
+
     return PJ_SUCCESS;
 
@@ -1031 +456 @@
 
 
-/*
- * Find account for incoming request.
- */
-PJ_DEF(pjsua_acc_id) pjsua_acc_find_for_incoming(pjsip_rx_data *rdata)
-{
-    pjsip_uri *uri;
-    pjsip_sip_uri *sip_uri;
-    unsigned acc_index;
-
-    uri = rdata->msg_info.to->uri;
-
-    /* Just return default account if To URI is not SIP: */
-    if (!PJSIP_URI_SCHEME_IS_SIP(uri) && 
-        !PJSIP_URI_SCHEME_IS_SIPS(uri)) 
-    {
-        return pjsua.default_acc;
-    }
-
-
-    sip_uri = (pjsip_sip_uri*)pjsip_uri_get_uri(uri);
-
-    /* Find account which has matching username and domain. */
-    for (acc_index=0; acc_index < pjsua.config.acc_cnt; ++acc_index) {
-
-        pjsua_acc *acc = &pjsua.acc[acc_index];
-
-        if (pj_stricmp(&acc->user_part, &sip_uri->user)==0 &&
-            pj_stricmp(&acc->host_part, &sip_uri->host)==0) 
-        {
-            /* Match ! */
-            return acc_index;
-        }
-    }
-
-    /* No matching, try match domain part only. */
-    for (acc_index=0; acc_index < pjsua.config.acc_cnt; ++acc_index) {
-
-        pjsua_acc *acc = &pjsua.acc[acc_index];
-
-        if (pj_stricmp(&acc->host_part, &sip_uri->host)==0) {
-            /* Match ! */
-            return acc_index;
-        }
-    }
-
-    /* Still no match, use default account */
-    return pjsua.default_acc;
-}
-
-
-/*
- * Find account for outgoing request.
- */
-PJ_DEF(pjsua_acc_id) pjsua_acc_find_for_outgoing(const pj_str_t *str_url)
-{
-    pj_str_t tmp;
-    pjsip_uri *uri;
-    pjsip_sip_uri *sip_uri;
-    unsigned i;
-
-    pj_strdup_with_null(pjsua.pool, &tmp, str_url);
-
-    uri = pjsip_parse_uri(pjsua.pool, tmp.ptr, tmp.slen, 0);
-    if (!uri)
-        return pjsua.config.acc_cnt-1;
-
-    if (!PJSIP_URI_SCHEME_IS_SIP(uri) && 
-        !PJSIP_URI_SCHEME_IS_SIPS(uri)) 
-    {
-        /* Return the first account with proxy */
-        for (i=0; i<PJ_ARRAY_SIZE(pjsua.acc); ++i) {
-            if (!pjsua.acc[i].valid)
-                continue;
-            if (pjsua.config.acc_config[i].proxy.slen)
-                break;
-        }
-
-        if (i != PJ_ARRAY_SIZE(pjsua.acc))
-            return i;
-
-        /* Not found, use default account */
-        return pjsua.default_acc;
-    }
-
-    sip_uri = pjsip_uri_get_uri(uri);
-
-    /* Find matching domain */
-    for (i=0; i<PJ_ARRAY_SIZE(pjsua.acc); ++i) {
-        if (!pjsua.acc[i].valid)
-            continue;
-        if (pj_stricmp(&pjsua.acc[i].host_part, &sip_uri->host)==0)
-            break;
-    }
-
-    if (i != PJ_ARRAY_SIZE(pjsua.acc))
-        return i;
-
-    /* Just use default account */
-    return pjsua.default_acc;
-}
-
-
-/*
- * Init account
- */
-static pj_status_t init_acc(unsigned acc_index)
-{
-    pjsua_acc_config *acc_cfg = &pjsua.config.acc_config[acc_index];
-    pjsua_acc *acc = &pjsua.acc[acc_index];
-    pjsip_uri *uri;
-    pjsip_sip_uri *sip_uri;
-
-    /* Need to parse local_uri to get the elements: */
-
-    uri = pjsip_parse_uri(pjsua.pool, acc_cfg->id.ptr,
-                          acc_cfg->id.slen, 0);
-    if (uri == NULL) {
-        pjsua_perror(THIS_FILE, "Invalid local URI", 
-                     PJSIP_EINVALIDURI);
-        return PJSIP_EINVALIDURI;
-    }
-
-    /* Local URI MUST be a SIP or SIPS: */
-
-    if (!PJSIP_URI_SCHEME_IS_SIP(uri) && 
-        !PJSIP_URI_SCHEME_IS_SIPS(uri)) 
-    {
-        pjsua_perror(THIS_FILE, "Invalid local URI", 
-                     PJSIP_EINVALIDSCHEME);
-        return PJSIP_EINVALIDSCHEME;
-    }
-
-
-    /* Get the SIP URI object: */
-
-    sip_uri = (pjsip_sip_uri*) pjsip_uri_get_uri(uri);
-
-    acc->user_part = sip_uri->user;
-    acc->host_part = sip_uri->host;
-
-    /* Build Contact header */
-
-    if (acc_cfg->contact.slen == 0)  {
-        char contact[128];
-        const char *addr;
-        int port;
-        int len;
-
-        addr = pjsua.config.sip_host.ptr;
-        port = pjsua.config.sip_port;
-
-        /* The local Contact is the username@ip-addr, where
-         *  - username is taken from the local URI,
-         *  - ip-addr in UDP transport's address name (which may have been
-         *    resolved from STUN.
-         */
-        
-        /* Build temporary contact string. */
-
-        if (sip_uri->user.slen) {
-
-            /* With the user part. */
-            len = pj_ansi_snprintf(contact, sizeof(contact),
-                              "<sip:%.*s@%s:%d>",
-                              (int)sip_uri->user.slen,
-                              sip_uri->user.ptr,
-                              addr, port);
-        } else {
-
-            /* Without user part */
-
-            len = pj_ansi_snprintf(contact, sizeof(contact),
-                              "<sip:%s:%d>",
-                              addr, port);
-        }
-
-        if (len < 1 || len >= sizeof(contact)) {
-            pjsua_perror(THIS_FILE, "Invalid Contact", PJSIP_EURITOOLONG);
-            return PJSIP_EURITOOLONG;
-        }
-
-        /* Duplicate Contact uri. */
-
-        pj_strdup2(pjsua.pool, &acc_cfg->contact, contact);
-
-    }
-
-
-    /* Build route-set for this account */
-    if (pjsua.config.outbound_proxy.slen) {
-        pj_str_t hname = { "Route", 5};
-        pjsip_route_hdr *r;
-        pj_str_t tmp;
-
-        pj_strdup_with_null(pjsua.pool, &tmp, &pjsua.config.outbound_proxy);
-        r = pjsip_parse_hdr(pjsua.pool, &hname, tmp.ptr, tmp.slen, NULL);
-        pj_list_push_back(&acc->route_set, r);
-    }
-
-    if (acc_cfg->proxy.slen) {
-        pj_str_t hname = { "Route", 5};
-        pjsip_route_hdr *r;
-        pj_str_t tmp;
-
-        pj_strdup_with_null(pjsua.pool, &tmp, &acc_cfg->proxy);
-        r = pjsip_parse_hdr(pjsua.pool, &hname, tmp.ptr, tmp.slen, NULL);
-        pj_list_push_back(&acc->route_set, r);
-    }
-
-    /* Mark account as valid */
-    pjsua.acc[acc_index].valid = PJ_TRUE;
-
-
-    return PJ_SUCCESS;
-}
-
-/*
- * Add a new account.
- */
-PJ_DEF(pj_status_t) pjsua_acc_add( const pjsua_acc_config *cfg,
-                                   pjsua_acc_id *acc_index)
-{
-    unsigned index;
-    pj_status_t status;
-
-    PJ_ASSERT_RETURN(pjsua.config.acc_cnt < 
-                        PJ_ARRAY_SIZE(pjsua.config.acc_config),
-                     PJ_ETOOMANY);
-
-    /* Find empty account index. */
-    for (index=0; index < PJ_ARRAY_SIZE(pjsua.acc); ++index) {
-        if (pjsua.acc[index].valid == PJ_FALSE)
-            break;
-    }
-
-    /* Expect to find a slot */
-    PJ_ASSERT_RETURN(index < PJ_ARRAY_SIZE(pjsua.acc), PJ_EBUG);
-
-    copy_acc_config(pjsua.pool, &pjsua.config.acc_config[index], cfg);
-    
-    status = init_acc(index);
-    if (status != PJ_SUCCESS) {
-        pjsua_perror(THIS_FILE, "Error adding account", status);
-        return status;
-    }
-
-    if (acc_index)
-        *acc_index = index;
-
-    pjsua.config.acc_cnt++;
-
-    return PJ_SUCCESS;
-}
-
-
-/*
- * Delete account.
- */
-PJ_DEF(pj_status_t) pjsua_acc_del(pjsua_acc_id acc_index)
-{
-    PJ_ASSERT_RETURN(acc_index < (int)pjsua.config.acc_cnt, 
-                     PJ_EINVAL);
-    PJ_ASSERT_RETURN(pjsua.acc[acc_index].valid, PJ_EINVALIDOP);
-
-    /* Delete registration */
-    if (pjsua.acc[acc_index].regc != NULL) 
-        pjsua_acc_set_registration(acc_index, PJ_FALSE);
-
-    /* Invalidate */
-    pjsua.acc[acc_index].valid = PJ_FALSE;
-
-    return PJ_SUCCESS;
-}
-
-
-/*
- * Start pjsua stack.
- * This will start the registration process, if registration is configured.
- */
-PJ_DEF(pj_status_t) pjsua_start(void)
-{
-    int i;  /* Must be signed */
-    unsigned count;
-    pj_status_t status = PJ_SUCCESS;
-
-
-    /* Add UDP transport: */
-    if (pjsua.sip_sock > 0) {
-
-        /* Init the published name for the transport.
-         * Depending whether STUN is used, this may be the STUN mapped
-         * address, or socket's bound address.
-         */
-        pjsip_host_port addr_name;
-
-        addr_name.host = pjsua.config.sip_host;
-        addr_name.port = pjsua.config.sip_port;
-
-        /* Create UDP transport from previously created UDP socket: */
-
-        status = pjsip_udp_transport_attach( pjsua.endpt, pjsua.sip_sock,
-                                             &addr_name, 1, 
-                                             NULL);
-        if (status != PJ_SUCCESS) {
-            pjsua_perror(THIS_FILE, "Unable to start UDP transport", 
-                         status);
-            goto on_error;
-        }
-    }
-
-    /* Initialize all unused accounts with default id and contact.
-     */
-    {
-        char buf[80];
-        pj_str_t tmp, id;
-
-        tmp.ptr = buf;
-        tmp.slen = pj_ansi_sprintf(tmp.ptr, "Local <sip:%s:%d>", 
-                                   pjsua.config.sip_host.ptr,
-                                   pjsua.config.sip_port);
-        pj_strdup_with_null( pjsua.pool, &id, &tmp);
-
-        for (i=pjsua.config.acc_cnt; i<PJ_ARRAY_SIZE(pjsua.config.acc_config);
-             ++i)
-        {
-            pjsua_acc_config *acc_cfg = 
-                &pjsua.config.acc_config[pjsua.config.acc_cnt];
-
-            acc_cfg->id = id;
-            acc_cfg->contact = id;
-        }
-    }
-    
-
-    /* Add another account as the last one. 
-     * This account corresponds to local endpoint, and is user-less.
-     * This is also the default account.
-     */
-    if (pjsua.config.acc_cnt < PJ_ARRAY_SIZE(pjsua.config.acc_config)) {
-        pjsua.default_acc = pjsua.config.acc_cnt;
-        pjsua.acc[pjsua.default_acc].auto_gen = 1;
-        pjsua.config.acc_cnt++;
-    }
-
-
-    /* Initialize accounts: */
-    for (i=0; i<(int)pjsua.config.acc_cnt; ++i) {
-        status = init_acc(i);
-        if (status != PJ_SUCCESS) {
-            pjsua_perror(THIS_FILE, "Error initializing account", status);
-            goto on_error;
-        }
-    }
-
-
-    /* Create worker thread(s), if required: */
-
-    for (i=0; i<(int)pjsua.config.thread_cnt; ++i) {
-        status = pj_thread_create( pjsua.pool, "pjsua", &pjsua_poll,
-                                   NULL, 0, 0, &pjsua.threads[i]);
-        if (status != PJ_SUCCESS) {
-            pjsua.quit_flag = 1;
-            for (--i; i>=0; --i) {
-                pj_thread_join(pjsua.threads[i]);
-                pj_thread_destroy(pjsua.threads[i]);
-            }
-            goto on_error;
-        }
-    }
-
-    /* Start registration: */
-
-    /* Create client registration session: */
-    for (i=0; i<(int)pjsua.config.acc_cnt; ++i) {
-        status = pjsua_regc_init(i);
-        if (status != PJ_SUCCESS)
-            goto on_error;
-
-        /* Perform registration, if required. */
-        if (pjsua.acc[i].regc) {
-            pjsua_acc_set_registration(i, PJ_TRUE);
-        }
-    }
-
-
-    /* Re-init buddies */
-    count = pjsua.config.buddy_cnt;
-    pjsua.config.buddy_cnt = 0;
-    for (i=0; i<(int)count; ++i) {
-        pj_str_t uri = pjsua.config.buddy_uri[i];
-        pjsua_buddy_add(&uri, NULL);
-    }
-
-
-    /* Refresh presence */
-    pjsua_pres_refresh();
-
-
-    PJ_LOG(3,(THIS_FILE, "PJSUA version %s started", PJ_VERSION));
-    return PJ_SUCCESS;
-
-on_error:
-    pjsua_destroy();
-    return status;
-}
-
-
 /* Sleep with polling */
 static void busy_sleep(unsigned msec)
@@ -1448 +466 @@
 
     do {
-        pjsua_poll(NULL);
+        while (pjsua_handle_events(10) > 0)
+            ;
         pj_gettimeofday(&now);
     } while (PJ_TIME_VAL_LT(now, timeout));
 }
 
-/**
- * Get maxinum number of conference ports.
- */
-PJ_DEF(unsigned) pjsua_conf_max_ports(void)
-{
-    return pjsua.config.conf_ports;
-}
-
-
-/**
- * Enum all conference port ID.
- */
-PJ_DEF(pj_status_t) pjsua_conf_enum_port_ids( pjsua_conf_port_id id[],
-                                              unsigned *count)
-{
-    return pjmedia_conf_enum_ports( pjsua.mconf, (unsigned*)id, count);
-}
-
-
-
-/**
- * Get information about the specified conference port
- */
-PJ_DEF(pj_status_t) pjsua_conf_get_port_info( pjsua_conf_port_id id,
-                                              pjsua_conf_port_info *info)
-{
-    pjmedia_conf_port_info cinfo;
-    unsigned i, count;
-    pj_status_t status;
-
-    status = pjmedia_conf_get_port_info( pjsua.mconf, id, &cinfo);
-    if (status != PJ_SUCCESS)
-        return status;
-
-    pj_memset(info, 0, sizeof(*info));
-    info->slot_id = id;
-    info->name = cinfo.name;
-    info->clock_rate = cinfo.clock_rate;
-    info->channel_count = cinfo.channel_count;
-    info->samples_per_frame = cinfo.samples_per_frame;
-    info->bits_per_sample = cinfo.bits_per_sample;
-
-    /* Build array of listeners */
-    count = pjsua.config.conf_ports;
-    for (i=0; i<count; ++i) {
-        if (cinfo.listener[i]) {
-            info->listeners[info->listener_cnt++] = i;
+/*
+ * Destroy pjsua.
+ */
+PJ_DEF(pj_status_t) pjsua_destroy(void)
+{
+    int i;  /* Must be signed */
+
+    /* Signal threads to quit: */
+    pjsua_var.thread_quit_flag = 1;
+
+    /* Wait worker threads to quit: */
+    for (i=0; i<(int)pjsua_var.ua_cfg.thread_cnt; ++i) {
+        if (pjsua_var.thread[i]) {
+            pj_thread_join(pjsua_var.thread[i]);
+            pj_thread_destroy(pjsua_var.thread[i]);
+            pjsua_var.thread[i] = NULL;
         }
     }
-
-    return PJ_SUCCESS;
-}
-
-
-/**
- * Connect conference port.
- */
-PJ_DEF(pj_status_t) pjsua_conf_connect( pjsua_conf_port_id src_port,
-                                        pjsua_conf_port_id dst_port)
-{
-    return pjmedia_conf_connect_port(pjsua.mconf, src_port, dst_port, 0);
-}
-
-
-/**
- * Connect conference port connection.
- */
-PJ_DEF(pj_status_t) pjsua_conf_disconnect( pjsua_conf_port_id src_port,
-                                           pjsua_conf_port_id dst_port)
-{
-    return pjmedia_conf_disconnect_port(pjsua.mconf, src_port, dst_port);
-}
-
-
-
-/**
- * Create a file player.
- */
-PJ_DEF(pj_status_t) pjsua_player_create( const pj_str_t *filename,
-                                         pjsua_player_id *id)
-{
-    unsigned slot;
-    char path[128];
-    pjmedia_port *port;
-    pj_status_t status;
-
-    if (pjsua.player_cnt >= PJ_ARRAY_SIZE(pjsua.player))
-        return PJ_ETOOMANY;
-
-    pj_memcpy(path, filename->ptr, filename->slen);
-    path[filename->slen] = '\0';
-    status = pjmedia_wav_player_port_create(pjsua.pool, path,
-                                            pjsua.samples_per_frame *
-                                               1000 / pjsua.clock_rate,
-                                            0, 0, NULL,
-                                            &port);
-    if (status != PJ_SUCCESS)
-        return status;
-
-    status = pjmedia_conf_add_port(pjsua.mconf, pjsua.pool, 
-                                   port, filename, &slot);
-    if (status != PJ_SUCCESS) {
-        pjmedia_port_destroy(port);
-        return status;
-    }
-
-    pjsua.player[pjsua.player_cnt].port = port;
-    pjsua.player[pjsua.player_cnt].slot = slot;
-
-    if (id)
-        *id = pjsua.player_cnt;
-
-    ++pjsua.player_cnt;
-
-    return PJ_SUCCESS;
-}
-
-
-/**
- * Get conference port associated with player.
- */
-PJ_DEF(pjsua_conf_port_id) pjsua_player_get_conf_port(pjsua_player_id id)
-{
-    PJ_ASSERT_RETURN(id>=0 && id < PJ_ARRAY_SIZE(pjsua.player), PJ_EINVAL);
-    return pjsua.player[id].slot;
-}
-
-
-/**
- * Re-wind playback.
- */
-PJ_DEF(pj_status_t) pjsua_player_set_pos(pjsua_player_id id,
-                                         pj_uint32_t samples)
-{
-    PJ_ASSERT_RETURN(id>=0 && id < PJ_ARRAY_SIZE(pjsua.player), PJ_EINVAL);
-    PJ_ASSERT_RETURN(pjsua.player[id].port != NULL, PJ_EINVALIDOP);
-
-    return pjmedia_wav_player_port_set_pos(pjsua.player[id].port, samples);
-}
-
-
-/**
- * Get conference port associated with player.
- */
-PJ_DEF(pj_status_t) pjsua_player_destroy(pjsua_player_id id)
-{
-    PJ_ASSERT_RETURN(id>=0 && id < PJ_ARRAY_SIZE(pjsua.player), PJ_EINVAL);
-
-    if (pjsua.player[id].port) {
-        pjmedia_port_destroy(pjsua.player[id].port);
-        pjsua.player[id].port = NULL;
-        pjsua.player[id].slot = 0xFFFF;
-        pjsua.player_cnt--;
-    }
-
-    return PJ_SUCCESS;
-}
-
-
-/**
- * Create a file recorder.
- */
-PJ_DEF(pj_status_t) pjsua_recorder_create( const pj_str_t *filename,
-                                           pjsua_recorder_id *id)
-{
-    unsigned slot;
-    char path[128];
-    pjmedia_port *port;
-    pj_status_t status;
-
-    if (pjsua.recorder_cnt >= PJ_ARRAY_SIZE(pjsua.recorder))
-        return PJ_ETOOMANY;
-
-    pj_memcpy(path, filename->ptr, filename->slen);
-    path[filename->slen] = '\0';
-    status = pjmedia_wav_writer_port_create(pjsua.pool, path,
-                                            pjsua.clock_rate, 1,
-                                            pjsua.samples_per_frame,
-                                            16, 0, 0, NULL,
-                                            &port);
-    if (status != PJ_SUCCESS)
-        return status;
-
-    status = pjmedia_conf_add_port(pjsua.mconf, pjsua.pool, 
-                                   port, filename, &slot);
-    if (status != PJ_SUCCESS) {
-        pjmedia_port_destroy(port);
-        return status;
-    }
-
-    pjsua.recorder[pjsua.recorder_cnt].port = port;
-    pjsua.recorder[pjsua.recorder_cnt].slot = slot;
-
-    if (*id)
-        *id = pjsua.recorder_cnt;
-
-    ++pjsua.recorder_cnt;
-
-    return PJ_SUCCESS;
-}
-
-
-/**
- * Get conference port associated with recorder.
- */
-PJ_DEF(pjsua_conf_port_id) pjsua_recorder_get_conf_port(pjsua_recorder_id id)
-{
-    PJ_ASSERT_RETURN(id>=0 && id < PJ_ARRAY_SIZE(pjsua.recorder), PJ_EINVAL);
-    return pjsua.recorder[id].slot;
-}
-
-
-/**
- * Destroy recorder (will complete recording).
- */
-PJ_DEF(pj_status_t) pjsua_recorder_destroy(pjsua_recorder_id id)
-{
-    PJ_ASSERT_RETURN(id>=0 && id < PJ_ARRAY_SIZE(pjsua.recorder), PJ_EINVAL);
-
-    if (pjsua.recorder[id].port) {
-        pjmedia_port_destroy(pjsua.recorder[id].port);
-        pjsua.recorder[id].port = NULL;
-        pjsua.recorder[id].slot = 0xFFFF;
-        pjsua.recorder_cnt--;
-    }
-
-    return PJ_SUCCESS;
-}
-
-/**
- * Enum sound devices.
- */
-PJ_DEF(pj_status_t) pjsua_enum_snd_devices( unsigned *count,
-                                            pjmedia_snd_dev_info info[])
-{
-    int i, dev_count;
-
-    dev_count = pjmedia_snd_get_dev_count();
-    if (dev_count > (int)*count)
-        dev_count = *count;
-
-    for (i=0; i<dev_count; ++i) {
-        const pjmedia_snd_dev_info *dev_info;
-        dev_info = pjmedia_snd_get_dev_info(i);
-        pj_memcpy(&info[i], dev_info, sizeof(pjmedia_snd_dev_info));
-    }
-
-    *count = dev_count;
-    return PJ_SUCCESS;
-}
-
-
-/**
- * Select or change sound device.
- */
-PJ_DEF(pj_status_t) pjsua_set_snd_dev( int snd_capture_id,
-                                       int snd_player_id)
-{
-    pjsua.config.snd_capture_id = snd_capture_id;
-    pjsua.config.snd_player_id = snd_player_id;
-    return PJ_SUCCESS;
-}
-
-
-/*
- * Destroy pjsua.
- */
-PJ_DEF(pj_status_t) pjsua_destroy(void)
-{
-    int i;  /* Must be signed */
-
-    /* Signal threads to quit: */
-    pjsua.quit_flag = 1;
-
-    /* Wait worker threads to quit: */
-    for (i=0; i<(int)pjsua.config.thread_cnt; ++i) {
-        
-        if (pjsua.threads[i]) {
-            pj_thread_join(pjsua.threads[i]);
-            pj_thread_destroy(pjsua.threads[i]);
-            pjsua.threads[i] = NULL;
-        }
-    }
-
     
-    if (pjsua.endpt) {
+    if (pjsua_var.endpt) {
         /* Terminate all calls. */
         pjsua_call_hangup_all();
@@ -1746 +499 @@
 
         /* Unregister, if required: */
-        for (i=0; i<(int)pjsua.config.acc_cnt; ++i) {
-            if (pjsua.acc[i].regc) {
+        for (i=0; i<(int)PJ_ARRAY_SIZE(pjsua_var.acc); ++i) {
+            if (!pjsua_var.acc[i].valid)
+                continue;
+
+            if (pjsua_var.acc[i].regc) {
                 pjsua_acc_set_registration(i, PJ_FALSE);
             }
@@ -1757 +513 @@
     }
 
-    /* If we have master port, destroying master port will recursively
-     * destroy conference bridge, otherwise must destroy it manually. 
+    /* Destroy media */
+    pjsua_media_subsys_destroy();
+
+    /* Destroy endpoint. */
+    if (pjsua_var.endpt) {
+        pjsip_endpt_destroy(pjsua_var.endpt);
+        pjsua_var.endpt = NULL;
+    }
+
+    /* Destroy mutex */
+    if (pjsua_var.mutex) {
+        pj_mutex_destroy(pjsua_var.mutex);
+        pjsua_var.mutex = NULL;
+    }
+
+    /* Destroy pool and pool factory. */
+    if (pjsua_var.pool) {
+        pj_pool_release(pjsua_var.pool);
+        pjsua_var.pool = NULL;
+        pj_caching_pool_destroy(&pjsua_var.cp);
+    }
+
+
+    PJ_LOG(4,(THIS_FILE, "PJSUA destroyed..."));
+
+    /* End logging */
+    if (pjsua_var.log_file) {
+        pj_file_close(pjsua_var.log_file);
+        pjsua_var.log_file = NULL;
+    }
+
+    /* Done. */
+    return PJ_SUCCESS;
+}
+
+
+/**
+ * Application is recommended to call this function after all initialization
+ * is done, so that the library can do additional checking set up
+ * additional 
+ *
+ * @return              PJ_SUCCESS on success, or the appropriate error code.
+ */
+PJ_DEF(pj_status_t) pjsua_start(void)
+{
+    pj_status_t status;
+
+    status = pjsua_call_subsys_start();
+    if (status != PJ_SUCCESS)
+        return status;
+
+    status = pjsua_media_subsys_start();
+    if (status != PJ_SUCCESS)
+        return status;
+
+    status = pjsua_pres_start();
+    if (status != PJ_SUCCESS)
+        return status;
+
+    return PJ_SUCCESS;
+}
+
+
+/**
+ * Poll pjsua for events, and if necessary block the caller thread for
+ * the specified maximum interval (in miliseconds).
+ */
+PJ_DEF(int) pjsua_handle_events(unsigned msec_timeout)
+{
+    unsigned count = 0;
+    pj_time_val tv;
+    pj_status_t status;
+
+    tv.sec = 0;
+    tv.msec = msec_timeout;
+    pj_time_val_normalize(&tv);
+
+    status = pjsip_endpt_handle_events2(pjsua_var.endpt, &tv, &count);
+
+    if (status != PJ_SUCCESS)
+        return -status;
+
+    return count;
+}
+
+
+/*
+ * Create memory pool.
+ */
+PJ_DEF(pj_pool_t*) pjsua_pool_create( const char *name, pj_size_t init_size,
+                                      pj_size_t increment)
+{
+    /* Pool factory is thread safe, no need to lock */
+    return pj_pool_create(&pjsua_var.cp.factory, name, init_size, increment, 
+                          NULL);
+}
+
+
+/*
+ * Internal function to get SIP endpoint instance of pjsua, which is
+ * needed for example to register module, create transports, etc.
+ * Probably is only valid after #pjsua_init() is called.
+ */
+PJ_DEF(pjsip_endpoint*) pjsua_get_pjsip_endpt(void)
+{
+    return pjsua_var.endpt;
+}
+
+/*
+ * Internal function to get media endpoint instance.
+ * Only valid after #pjsua_init() is called.
+ */
+PJ_DEF(pjmedia_endpt*) pjsua_get_pjmedia_endpt(void)
+{
+    return pjsua_var.med_endpt;
+}
+
+
+/*****************************************************************************
+ * PJSUA SIP Transport API.
+ */
+
+/*
+ * Create and initialize SIP socket (and possibly resolve public
+ * address via STUN, depending on config).
+ */
+static pj_status_t create_sip_udp_sock(pj_in_addr bound_addr,
+                                       int port,
+                                       pj_bool_t use_stun,
+                                       const pjsua_stun_config *stun_param,
+                                       pj_sock_t *p_sock,
+                                       pj_sockaddr_in *p_pub_addr)
+{
+    pjsua_stun_config stun;
+    pj_sock_t sock;
+    pj_status_t status;
+
+    PJSUA_LOCK();
+
+    status = pj_sock_socket(PJ_AF_INET, PJ_SOCK_DGRAM, 0, &sock);
+    if (status != PJ_SUCCESS) {
+        pjsua_perror(THIS_FILE, "socket() error", status);
+        goto on_return;
+    }
+
+    status = pj_sock_bind_in(sock, bound_addr.s_addr, (pj_uint16_t)port);
+    if (status != PJ_SUCCESS) {
+        pjsua_perror(THIS_FILE, "bind() error", status);
+        pj_sock_close(sock);
+        goto on_return;
+    }
+
+    /* Copy and normalize STUN param */
+    if (use_stun) {
+        pj_memcpy(&stun, stun_param, sizeof(*stun_param));
+        pjsua_normalize_stun_config(&stun);
+    } else {
+        pj_memset(&stun, 0, sizeof(pjsua_stun_config));
+    }
+
+    /* Get the published address, either by STUN or by resolving
+     * the name of local host.
      */
-    if (pjsua.master_port) {
-        pjmedia_master_port_destroy(pjsua.master_port);
-        pjsua.master_port = NULL;
+    if (stun.stun_srv1.slen) {
+        status = pj_stun_get_mapped_addr(&pjsua_var.cp.factory, 1, &sock,
+                                         &stun.stun_srv1, 
+                                          stun.stun_port1,
+                                         &stun.stun_srv2, 
+                                          stun.stun_port2,
+                                          p_pub_addr);
+        if (status != PJ_SUCCESS) {
+            pjsua_perror(THIS_FILE, "Error resolving with STUN", status);
+            pj_sock_close(sock);
+            goto on_return;
+        }
+
     } else {
-        if (pjsua.snd_port) {
-            pjmedia_snd_port_destroy(pjsua.snd_port);
-            pjsua.snd_port = NULL;
+
+        const pj_str_t *hostname = pj_gethostname();
+        struct pj_hostent he;
+
+        status = pj_gethostbyname(hostname, &he);
+        if (status != PJ_SUCCESS) {
+            pjsua_perror(THIS_FILE, "Unable to resolve local host", status);
+            pj_sock_close(sock);
+            goto on_return;
         }
-        if (pjsua.mconf) {
-            pjmedia_conf_destroy(pjsua.mconf);
-            pjsua.mconf = NULL;
+
+        pj_memset(p_pub_addr, 0, sizeof(pj_sockaddr_in));
+        p_pub_addr->sin_family = PJ_AF_INET;
+        p_pub_addr->sin_port = pj_htons((pj_uint16_t)port);
+        p_pub_addr->sin_addr = *(pj_in_addr*)he.h_addr;
+    }
+
+    *p_sock = sock;
+
+on_return:
+
+    PJSUA_UNLOCK();
+
+    PJ_LOG(4,(THIS_FILE, "SIP UDP socket reachable at %s:%d",
+              pj_inet_ntoa(p_pub_addr->sin_addr),
+              (int)pj_ntohs(p_pub_addr->sin_port)));
+
+    return status;
+}
+
+
+/*
+ * Create SIP transport.
+ */
+PJ_DEF(pj_status_t) pjsua_transport_create( pjsip_transport_type_e type,
+                                            const pjsua_transport_config *cfg,
+                                            pjsua_transport_id *p_id)
+{
+    pjsip_transport *tp;
+    unsigned id;
+    pj_status_t status;
+
+    PJSUA_LOCK();
+
+    /* Find empty transport slot */
+    for (id=0; id < PJ_ARRAY_SIZE(pjsua_var.tpdata); ++id) {
+        if (pjsua_var.tpdata[id].tp == NULL)
+            break;
+    }
+
+    if (id == PJ_ARRAY_SIZE(pjsua_var.tpdata)) {
+        status = PJ_ETOOMANY;
+        pjsua_perror(THIS_FILE, "Error creating transport", status);
+        goto on_return;
+    }
+
+    /* Create the transport */
+    if (type == PJSIP_TRANSPORT_UDP) {
+
+        pjsua_transport_config config;
+        pj_sock_t sock;
+        pj_sockaddr_in pub_addr;
+        pjsip_host_port addr_name;
+
+        /* Supply default config if it's not specified */
+        if (cfg == NULL) {
+            pjsua_transport_config_default(&config);
+            cfg = &config;
         }
-    }
-
-    /* Destroy file players */
-    for (i=0; i<PJ_ARRAY_SIZE(pjsua.player); ++i) {
-        if (pjsua.player[i].port) {
-            pjmedia_port_destroy(pjsua.player[i].port);
-            pjsua.player[i].port = NULL;
+
+        /* Create the socket and possibly resolve the address with STUN */
+        status = create_sip_udp_sock(cfg->ip_addr, cfg->port, cfg->use_stun,
+                                     &cfg->stun_config, &sock, &pub_addr);
+        if (status != PJ_SUCCESS)
+            goto on_return;
+
+        addr_name.host = pj_str(pj_inet_ntoa(pub_addr.sin_addr));
+        addr_name.port = pj_ntohs(pub_addr.sin_port);
+
+        /* Create UDP transport */
+        status = pjsip_udp_transport_attach( pjsua_var.endpt, sock,
+                                             &addr_name, 1, 
+                                             &tp);
+        if (status != PJ_SUCCESS) {
+            pjsua_perror(THIS_FILE, "Error creating SIP UDP transport", 
+                         status);
+            pj_sock_close(sock);
+            goto on_return;
         }
-    }
-
-
-    /* Destroy file recorders */
-    for (i=0; i<PJ_ARRAY_SIZE(pjsua.recorder); ++i) {
-        if (pjsua.recorder[i].port) {
-            pjmedia_port_destroy(pjsua.recorder[i].port);
-            pjsua.recorder[i].port = NULL;
-        }
-    }
-
-
-    /* Close transports */
-    for (i=0; i<(int)pjsua.config.max_calls; ++i) {
-        if (pjsua.calls[i].med_tp) {
-            (*pjsua.calls[i].med_tp->op->destroy)(pjsua.calls[i].med_tp);
-            pjsua.calls[i].med_tp = NULL;
-        }
-    }
-
-    /* Destroy media endpoint. */
-    if (pjsua.med_endpt) {
-
-        /* Shutdown all codecs: */
-#       if PJMEDIA_HAS_SPEEX_CODEC
-            pjmedia_codec_speex_deinit();
-#       endif /* PJMEDIA_HAS_SPEEX_CODEC */
-
-#       if PJMEDIA_HAS_GSM_CODEC
-            pjmedia_codec_gsm_deinit();
-#       endif /* PJMEDIA_HAS_GSM_CODEC */
-
-#       if PJMEDIA_HAS_G711_CODEC
-            pjmedia_codec_g711_deinit();
-#       endif   /* PJMEDIA_HAS_G711_CODEC */
-
-#       if PJMEDIA_HAS_L16_CODEC
-            pjmedia_codec_l16_deinit();
-#       endif   /* PJMEDIA_HAS_L16_CODEC */
-
-
-        pjmedia_endpt_destroy(pjsua.med_endpt);
-        pjsua.med_endpt = NULL;
-    }
-
-    /* Destroy endpoint. */
-    if (pjsua.endpt) {
-        pjsip_endpt_destroy(pjsua.endpt);
-        pjsua.endpt = NULL;
-    }
-
-    /* Destroy caching pool. */
-    pj_caching_pool_destroy(&pjsua.cp);
-
-
-    PJ_LOG(4,(THIS_FILE, "PJSUA destroyed..."));
-
-    /* End logging */
-    logging_shutdown();
-
-    /* Done. */
+
+    } else {
+        status = PJSIP_EUNSUPTRANSPORT;
+        pjsua_perror(THIS_FILE, "Error creating transport", status);
+        goto on_return;
+    }
+
+    /* Save the transport */
+    pjsua_var.tpdata[id].tp = tp;
+
+    /* Return the ID */
+    if (p_id) *p_id = id;
+
+    status = PJ_SUCCESS;
+
+on_return:
+
+    PJSUA_UNLOCK();
 
     return PJ_SUCCESS;
@@ -1846 +802 @@
 
 
-/**
- * Get SIP endpoint instance.
- * Only valid after pjsua_init().
- */
-PJ_DEF(pjsip_endpoint*) pjsua_get_pjsip_endpt(void)
-{
-    return pjsua.endpt;
-}
-
-/**
- * Get media endpoint instance.
- * Only valid after pjsua_init().
- */
-PJ_DEF(pjmedia_endpt*) pjsua_get_pjmedia_endpt(void)
-{
-    return pjsua.med_endpt;
-}
-
+/*
+ * Register transport that has been created by application.
+ */
+PJ_DEF(pj_status_t) pjsua_transport_register( pjsip_transport *tp,
+                                              pjsua_transport_id *p_id)
+{
+    unsigned id;
+
+    PJSUA_LOCK();
+
+    /* Find empty transport slot */
+    for (id=0; id < PJ_ARRAY_SIZE(pjsua_var.tpdata); ++id) {
+        if (pjsua_var.tpdata[id].tp == NULL)
+            break;
+    }
+
+    if (id == PJ_ARRAY_SIZE(pjsua_var.tpdata)) {
+        pjsua_perror(THIS_FILE, "Error creating transport", PJ_ETOOMANY);
+        PJSUA_UNLOCK();
+        return PJ_ETOOMANY;
+    }
+
+    /* Save the transport */
+    pjsua_var.tpdata[id].tp = tp;
+
+    /* Return the ID */
+    if (p_id) *p_id = id;
+
+    PJSUA_UNLOCK();
+
+    return PJ_SUCCESS;
+}
+
+
+/*
+ * Enumerate all transports currently created in the system.
+ */
+PJ_DEF(pj_status_t) pjsua_enum_transports( pjsua_transport_id id[],
+                                           unsigned *p_count )
+{
+    unsigned i, count;
+
+    PJSUA_LOCK();
+
+    for (i=0, count=0; i<PJ_ARRAY_SIZE(pjsua_var.tpdata) && count<*p_count; 
+         ++i) 
+    {
+        if (!pjsua_var.tpdata[i].tp)
+            continue;
+
+        id[count++] = i;
+    }
+
+    *p_count = count;
+
+    PJSUA_UNLOCK();
+
+    return PJ_SUCCESS;
+}
+
+
+/*
+ * Get information about transports.
+ */
+PJ_DEF(pj_status_t) pjsua_transport_get_info( pjsua_transport_id id,
+                                              pjsua_transport_info *info)
+{
+    pjsip_transport *tp;
+
+    pj_memset(info, 0, sizeof(*info));
+
+    /* Make sure id is in range. */
+    PJ_ASSERT_RETURN(id>=0 && id<PJ_ARRAY_SIZE(pjsua_var.tpdata), PJ_EINVAL);
+
+    /* Make sure that transport exists */
+    PJ_ASSERT_RETURN(pjsua_var.tpdata[id].tp != NULL, PJ_EINVAL);
+
+    PJSUA_LOCK();
+
+    tp = pjsua_var.tpdata[id].tp;
+    if (tp == NULL) {
+        PJSUA_UNLOCK();
+        return PJ_EINVALIDOP;
+    }
+    
+    info->id = id;
+    info->type = tp->key.type;
+    info->type_name = pj_str(tp->type_name);
+    info->info = pj_str(tp->info);
+    info->flag = tp->flag;
+    info->addr_len = tp->addr_len;
+    info->local_addr = tp->local_addr;
+    info->local_name = tp->local_name;
+    info->usage_count = pj_atomic_get(tp->ref_cnt);
+
+    PJSUA_UNLOCK();
+
+    return PJ_EINVALIDOP;
+}
+
+
+/*
+ * Disable a transport or re-enable it.
+ */
+PJ_DEF(pj_status_t) pjsua_transport_set_enable( pjsua_transport_id id,
+                                                pj_bool_t enabled)
+{
+    /* Make sure id is in range. */
+    PJ_ASSERT_RETURN(id>=0 && id<PJ_ARRAY_SIZE(pjsua_var.tpdata), PJ_EINVAL);
+
+    /* Make sure that transport exists */
+    PJ_ASSERT_RETURN(pjsua_var.tpdata[id].tp != NULL, PJ_EINVAL);
+
+
+    /* To be done!! */
+    PJ_TODO(pjsua_transport_set_enable);
+
+    return PJ_EINVALIDOP;
+}
+
+
+/*
+ * Close the transport.
+ */
+PJ_DEF(pj_status_t) pjsua_transport_close( pjsua_transport_id id,
+                                           pj_bool_t force )
+{
+    /* Make sure id is in range. */
+    PJ_ASSERT_RETURN(id>=0 && id<PJ_ARRAY_SIZE(pjsua_var.tpdata), PJ_EINVAL);
+
+    /* Make sure that transport exists */
+    PJ_ASSERT_RETURN(pjsua_var.tpdata[id].tp != NULL, PJ_EINVAL);
+
+
+    /* To be done!! */
+
+
+    PJ_TODO(pjsua_transport_close);
+
+    return PJ_EINVALIDOP;
+}
+
+
+/*
+ * Add additional headers etc in msg_data specified by application
+ * when sending requests.
+ */
+void pjsua_process_msg_data(pjsip_tx_data *tdata,
+                            const pjsua_msg_data *msg_data)
+{
+    pj_bool_t allow_body;
+    const pjsip_hdr *hdr;
+
+    if (!msg_data)
+        return;
+
+    hdr = msg_data->hdr_list.next;
+    while (hdr && hdr != &msg_data->hdr_list) {
+        pjsip_hdr *new_hdr;
+
+        new_hdr = pjsip_hdr_clone(tdata->pool, hdr);
+        pjsip_msg_add_hdr(tdata->msg, new_hdr);
+
+        hdr = hdr->next;
+    }
+
+    allow_body = (tdata->msg->body == NULL);
+
+    if (allow_body && msg_data->content_type.slen && msg_data->msg_body.slen) {
+        pjsip_media_type ctype;
+        pjsip_msg_body *body;   
+
+        pjsua_parse_media_type(tdata->pool, &msg_data->content_type, &ctype);
+        body = pjsip_msg_body_create(tdata->pool, &ctype.type, &ctype.subtype,
+                                     &msg_data->msg_body);
+        tdata->msg->body = body;
+    }
+}
+
+
+/*
+ * Add route_set to outgoing requests
+ */
+void pjsua_set_msg_route_set( pjsip_tx_data *tdata,
+                              const pjsip_route_hdr *route_set )
+{
+    const pjsip_route_hdr *r;
+
+    r = route_set->next;
+    while (r != route_set) {
+        pjsip_route_hdr *new_r;
+
+        new_r = pjsip_hdr_clone(tdata->pool, r);
+        pjsip_msg_add_hdr(tdata->msg, (pjsip_hdr*)new_r);
+
+        r = r->next;
+    }
+}
+
+
+/*
+ * Simple version of MIME type parsing (it doesn't support parameters)
+ */
+void pjsua_parse_media_type( pj_pool_t *pool,
+                             const pj_str_t *mime,
+                             pjsip_media_type *media_type)
+{
+    pj_str_t tmp;
+    char *pos;
+
+    pj_memset(media_type, 0, sizeof(*media_type));
+
+    pj_strdup_with_null(pool, &tmp, mime);
+
+    pos = pj_strchr(&tmp, '/');
+    if (pos) {
+        media_type->type.ptr = tmp.ptr; 
+        media_type->type.slen = (pos-tmp.ptr);
+        media_type->subtype.ptr = pos+1; 
+        media_type->subtype.slen = tmp.ptr+tmp.slen-pos-1;
+    } else {
+        media_type->type = tmp;
+    }
+}
+
+
+/*
+ * Verify that valid SIP url is given.
+ */
+PJ_DEF(pj_status_t) pjsua_verify_sip_url(const char *c_url)
+{
+    pjsip_uri *p;
+    pj_pool_t *pool;
+    char *url;
+    int len = (c_url ? pj_ansi_strlen(c_url) : 0);
+
+    if (!len) return -1;
+
+    pool = pj_pool_create(&pjsua_var.cp.factory, "check%p", 1024, 0, NULL);
+    if (!pool) return -1;
+
+    url = pj_pool_alloc(pool, len+1);
+    pj_ansi_strcpy(url, c_url);
+
+    p = pjsip_parse_uri(pool, url, len, 0);
+    if (!p || pj_stricmp2(pjsip_uri_get_scheme(p), "sip") != 0)
+        p = NULL;
+
+    pj_pool_release(pool);
+    return p ? 0 : -1;
+}

pjproject/trunk/pjsip/src/pjsua-lib/pjsua_im.c

@@ -18 +18 @@
  */
 #include <pjsua-lib/pjsua.h>
-#include <pj/log.h>
-#include "pjsua_imp.h"
-
-/*
- * pjsua_im.c
- *
- * To handle incoming MESSAGE outside dialog.
- * Incoming MESSAGE inside dialog is hanlded in pjsua_call.c.
- */
-
-#define THIS_FILE   "pjsua_im.c"
+#include <pjsua-lib/pjsua_internal.h>
+
+
+#define THIS_FILE   "pjsua_im.h"
 
 
@@ -50 +43 @@
 /* Proto */
 static pj_bool_t im_on_rx_request(pjsip_rx_data *rdata);
+
 
 /* The module instance. */
@@ -137 +131 @@
  *          This may trigger pjsua_ui_on_pager() or pjsua_ui_on_typing().
  */
-void pjsua_im_process_pager(int call_index, const pj_str_t *from,
+void pjsua_im_process_pager(int call_id, const pj_str_t *from,
                             const pj_str_t *to, pjsip_rx_data *rdata)
 {
+    pjsip_contact_hdr *contact_hdr;
+    pj_str_t contact;
     pjsip_msg_body *body = rdata->msg_info.msg->body;
 
     /* Body MUST have been checked before */
     pj_assert(body != NULL);
+
+
+    /* Build remote contact */
+    contact_hdr = pjsip_msg_find_hdr(rdata->msg_info.msg, PJSIP_H_CONTACT,
+                                     NULL);
+    if (contact_hdr) {
+        contact.ptr = pj_pool_alloc(rdata->tp_info.pool, 
+                                    PJSIP_MAX_URL_SIZE);
+        contact.slen = pjsip_uri_print(PJSIP_URI_IN_CONTACT_HDR,
+                                       contact_hdr->uri, contact.ptr,
+                                       PJSIP_MAX_URL_SIZE);
+    } else {
+        contact.slen = 0;
+    }
+
 
     if (pj_stricmp(&body->content_type.type, &STR_MIME_TEXT)==0 &&
         pj_stricmp(&body->content_type.subtype, &STR_MIME_PLAIN)==0)
     {
-        pj_str_t text;
-
-        /* Build the text. */
-        text.ptr = rdata->msg_info.msg->body->data;
-        text.slen = rdata->msg_info.msg->body->len;
-
-        if (pjsua.cb.on_pager)
-            (*pjsua.cb.on_pager)(call_index, from, to, &text);
+        const pj_str_t mime_text_plain = pj_str("text/plain");
+        pj_str_t text_body;
+        
+        /* Save text body */
+        text_body.ptr = rdata->msg_info.msg->body->data;
+        text_body.slen = rdata->msg_info.msg->body->len;
+
+        if (pjsua_var.ua_cfg.cb.on_pager) {
+            (*pjsua_var.ua_cfg.cb.on_pager)(call_id, from, to, &contact, 
+                                            &mime_text_plain, &text_body);
+        }
 
     } else {
-
         /* Expecting typing indication */
-
         pj_status_t status;
         pj_bool_t is_typing;
@@ -172 +184 @@
         }
 
-        if (pjsua.cb.on_typing)
-            (*pjsua.cb.on_typing)(call_index, from, to, is_typing);
+        if (pjsua_var.ua_cfg.cb.on_typing) {
+            (*pjsua_var.ua_cfg.cb.on_typing)(call_id, from, to, &contact,
+                                             is_typing);
+        }
     }
 
@@ -211 +225 @@
         pj_list_push_back(&hdr_list, accept_hdr);
 
-        pjsip_endpt_respond_stateless(pjsua.endpt, rdata, 
+        pjsip_endpt_respond_stateless(pjsua_var.endpt, rdata, 
                                       PJSIP_SC_NOT_ACCEPTABLE_HERE, NULL, 
                                       &hdr_list, NULL);
@@ -220 +234 @@
      * the UI takes too long to process the message. 
      */
-    status = pjsip_endpt_respond( pjsua.endpt, NULL, rdata, 200, NULL,
+    status = pjsip_endpt_respond( pjsua_var.endpt, NULL, rdata, 200, NULL,
                                   NULL, NULL, NULL);
 
@@ -262 +276 @@
 static void im_callback(void *token, pjsip_event *e)
 {
-    pj_str_t *text = token;
+    pjsua_im_data *im_data = token;
 
     if (e->type == PJSIP_EVENT_TSX_STATE) {
 
         pjsip_transaction *tsx = e->body.tsx_state.tsx;
+
+        /* Ignore provisional response, if any */
+        if (tsx->status_code < 200)
+            return;
+
+
+        /* Handle authentication challenges */
+        if (e->body.tsx_state.type == PJSIP_EVENT_RX_MSG &&
+            (tsx->status_code == 401 || tsx->status_code == 407)) 
+        {
+            pjsip_rx_data *rdata = e->body.tsx_state.src.rdata;
+            pjsip_tx_data *tdata;
+            pjsip_auth_clt_sess auth;
+            pj_status_t status;
+
+            PJ_LOG(4,(THIS_FILE, "Resending IM with authentication"));
+
+            /* Create temporary authentication session */
+            pjsip_auth_clt_init(&auth,pjsua_var.endpt,rdata->tp_info.pool, 0);
+    
+            pjsip_auth_clt_set_credentials(&auth, 
+                pjsua_var.acc[im_data->acc_id].cred_cnt,
+                pjsua_var.acc[im_data->acc_id].cred);
+
+            status = pjsip_auth_clt_reinit_req(&auth, rdata, tsx->last_tx,
+                                               &tdata);
+            if (status == PJ_SUCCESS) {
+                pjsua_im_data *im_data2;
+
+                /* Must duplicate im_data */
+                im_data2 = pjsua_im_data_dup(tdata->pool, im_data);
+
+                /* Re-send request */
+                status = pjsip_endpt_send_request( pjsua_var.endpt, tdata, -1,
+                                                   im_data2, &im_callback);
+                if (status == PJ_SUCCESS) {
+                    /* Done */
+                    return;
+                }
+            }
+        }
 
         if (tsx->status_code/100 == 2) {
             PJ_LOG(4,(THIS_FILE, 
                       "Message \'%s\' delivered successfully",
-                      text->ptr));
+                      im_data->body.ptr));
         } else {
             PJ_LOG(3,(THIS_FILE, 
-                      "Failed to deliver message \'%s\': %s [st_code=%d]",
-                      text->ptr,
-                      pjsip_get_status_text(tsx->status_code)->ptr,
-                      tsx->status_code));
+                      "Failed to deliver message \'%s\': %d/%.*s",
+                      im_data->body.ptr,
+                      tsx->status_code,
+                      (int)tsx->status_text.slen,
+                      tsx->status_text.ptr));
         }
-    }
-}
-
-
-/**
- * Send IM outside dialog.
- */
-PJ_DEF(pj_status_t) pjsua_im_send(int acc_index, const pj_str_t *dst_uri, 
-                                  const pj_str_t *str)
+
+        if (pjsua_var.ua_cfg.cb.on_pager_status)
+            pjsua_var.ua_cfg.cb.on_pager_status(im_data->call_id, 
+                                                &im_data->to,
+                                                &im_data->body,
+                                                im_data->user_data,
+                                                tsx->status_code,
+                                                &tsx->status_text);
+    }
+}
+
+
+/* Outgoing typing indication callback. 
+ * (used to reauthenticate request)
+ */
+static void typing_callback(void *token, pjsip_event *e)
+{
+    pjsua_im_data *im_data = token;
+
+    if (e->type == PJSIP_EVENT_TSX_STATE) {
+
+        pjsip_transaction *tsx = e->body.tsx_state.tsx;
+
+        /* Ignore provisional response, if any */
+        if (tsx->status_code < 200)
+            return;
+
+        /* Handle authentication challenges */
+        if (e->body.tsx_state.type == PJSIP_EVENT_RX_MSG &&
+            (tsx->status_code == 401 || tsx->status_code == 407)) 
+        {
+            pjsip_rx_data *rdata = e->body.tsx_state.src.rdata;
+            pjsip_tx_data *tdata;
+            pjsip_auth_clt_sess auth;
+            pj_status_t status;
+
+            PJ_LOG(4,(THIS_FILE, "Resending IM with authentication"));
+
+            /* Create temporary authentication session */
+            pjsip_auth_clt_init(&auth,pjsua_var.endpt,rdata->tp_info.pool, 0);
+    
+            pjsip_auth_clt_set_credentials(&auth, 
+                pjsua_var.acc[im_data->acc_id].cred_cnt,
+                pjsua_var.acc[im_data->acc_id].cred);
+
+            status = pjsip_auth_clt_reinit_req(&auth, rdata, tsx->last_tx,
+                                               &tdata);
+            if (status == PJ_SUCCESS) {
+                pjsua_im_data *im_data2;
+
+                /* Must duplicate im_data */
+                im_data2 = pjsua_im_data_dup(tdata->pool, im_data);
+
+                /* Re-send request */
+                status = pjsip_endpt_send_request( pjsua_var.endpt, tdata, -1,
+                                                   im_data2, &typing_callback);
+                if (status == PJ_SUCCESS) {
+                    /* Done */
+                    return;
+                }
+            }
+        }
+
+    }
+}
+
+
+/*
+ * Send instant messaging outside dialog, using the specified account for
+ * route set and authentication.
+ */
+PJ_DEF(pj_status_t) pjsua_im_send( pjsua_acc_id acc_id, 
+                                   const pj_str_t *to,
+                                   const pj_str_t *mime_type,
+                                   const pj_str_t *content,
+                                   const pjsua_msg_data *msg_data,
+                                   void *user_data)
 {
     pjsip_tx_data *tdata;
+    const pj_str_t mime_text_plain = pj_str("text/plain");
     const pj_str_t STR_CONTACT = { "Contact", 7 };
-    const pj_str_t mime_text = pj_str("text");
-    const pj_str_t mime_plain = pj_str("plain");
-    pj_str_t *text;
+    pjsip_media_type media_type;
+    pjsua_im_data *im_data;
     pj_status_t status;
 
+    /* To and message body must be specified. */
+    PJ_ASSERT_RETURN(to && content, PJ_EINVAL);
+
     /* Create request. */
-    status = pjsip_endpt_create_request(pjsua.endpt, &pjsip_message_method,
-                                        dst_uri, 
-                                        &pjsua.config.acc_config[acc_index].id,
-                                        dst_uri, NULL, NULL, -1, NULL, &tdata);
+    status = pjsip_endpt_create_request(pjsua_var.endpt, 
+                                        &pjsip_message_method, to, 
+                                        &pjsua_var.acc[acc_id].cfg.id,
+                                        to, NULL, NULL, -1, NULL, &tdata);
     if (status != PJ_SUCCESS) {
         pjsua_perror(THIS_FILE, "Unable to create request", status);
@@ -314 +441 @@
         pjsip_generic_string_hdr_create(tdata->pool, 
                                         &STR_CONTACT,
-                                        &pjsua.config.acc_config[acc_index].contact));
-
-    /* Duplicate text.
-     * We need to keep the text because we will display it when we fail to
-     * send the message.
+                                        &pjsua_var.acc[acc_id].cfg.contact));
+
+    /* Create IM data to keep message details and give it back to
+     * application on the callback
      */
-    text = pj_pool_alloc(tdata->pool, sizeof(pj_str_t));
-    pj_strdup_with_null(tdata->pool, text, str);
+    im_data = pj_pool_zalloc(tdata->pool, sizeof(*im_data));
+    im_data->acc_id = acc_id;
+    im_data->call_id = PJSUA_INVALID_ID;
+    pj_strdup_with_null(tdata->pool, &im_data->to, to);
+    pj_strdup_with_null(tdata->pool, &im_data->body, content);
+    im_data->user_data = user_data;
+
+
+    /* Set default media type if none is specified */
+    if (mime_type == NULL) {
+        mime_type = &mime_text_plain;
+    }
+
+    /* Parse MIME type */
+    pjsua_parse_media_type(tdata->pool, mime_type, &media_type);
 
     /* Add message body */
-    tdata->msg->body = pjsip_msg_body_create( tdata->pool, &mime_text,
-                                              &mime_plain, text);
+    tdata->msg->body = pjsip_msg_body_create( tdata->pool, &media_type.type,
+                                              &media_type.subtype, 
+                                              &im_data->body);
     if (tdata->msg->body == NULL) {
         pjsua_perror(THIS_FILE, "Unable to create msg body", PJ_ENOMEM);
@@ -332 +472 @@
     }
 
+    /* Add additional headers etc. */
+    pjsua_process_msg_data(tdata, msg_data);
+
+    /* Add route set */
+    pjsua_set_msg_route_set(tdata, &pjsua_var.acc[acc_id].route_set);
+
     /* Send request (statefully) */
-    status = pjsip_endpt_send_request( pjsua.endpt, tdata, -1, 
-                                       text, &im_callback);
+    status = pjsip_endpt_send_request( pjsua_var.endpt, tdata, -1, 
+                                       im_data, &im_callback);
     if (status != PJ_SUCCESS) {
         pjsua_perror(THIS_FILE, "Unable to send request", status);
@@ -344 +490 @@
 
 
-/**
+/*
  * Send typing indication outside dialog.
  */
-PJ_DEF(pj_status_t) pjsua_im_typing(int acc_index, const pj_str_t *dst_uri, 
-                                    pj_bool_t is_typing)
+PJ_DEF(pj_status_t) pjsua_im_typing( pjsua_acc_id acc_id, 
+                                     const pj_str_t *to, 
+                                     pj_bool_t is_typing,
+                                     const pjsua_msg_data *msg_data)
 {
     const pj_str_t STR_CONTACT = { "Contact", 7 };
+    pjsua_im_data *im_data;
     pjsip_tx_data *tdata;
     pj_status_t status;
 
     /* Create request. */
-    status = pjsip_endpt_create_request( pjsua.endpt, &pjsip_message_method,
-                                         dst_uri, 
-                                         &pjsua.config.acc_config[acc_index].id,
-                                         dst_uri, NULL, NULL, -1, NULL, &tdata);
+    status = pjsip_endpt_create_request( pjsua_var.endpt, &pjsip_message_method,
+                                         to, &pjsua_var.acc[acc_id].cfg.id,
+                                         to, NULL, NULL, -1, NULL, &tdata);
     if (status != PJ_SUCCESS) {
         pjsua_perror(THIS_FILE, "Unable to create request", status);
@@ -374 +522 @@
         pjsip_generic_string_hdr_create(tdata->pool, 
                                         &STR_CONTACT,
-                                        &pjsua.config.acc_config[acc_index].contact));
+                                        &pjsua_var.acc[acc_id].cfg.contact));
 
 
@@ -381 +529 @@
                                                       NULL, NULL, -1);
 
+    /* Add additional headers etc. */
+    pjsua_process_msg_data(tdata, msg_data);
+
+    /* Create data to reauthenticate */
+    im_data = pj_pool_zalloc(tdata->pool, sizeof(*im_data));
+    im_data->acc_id = acc_id;
+
     /* Send request (statefully) */
-    status = pjsip_endpt_send_request( pjsua.endpt, tdata, -1, 
-                                       NULL, NULL);
+    status = pjsip_endpt_send_request( pjsua_var.endpt, tdata, -1, 
+                                       im_data, &typing_callback);
     if (status != PJ_SUCCESS) {
         pjsua_perror(THIS_FILE, "Unable to send request", status);
@@ -402 +557 @@
 
     /* Register module */
-    status = pjsip_endpt_register_module(pjsua.endpt, &mod_pjsua_im);
+    status = pjsip_endpt_register_module(pjsua_var.endpt, &mod_pjsua_im);
     if (status != PJ_SUCCESS)
         return status;
 
     /* Register support for MESSAGE method. */
-    pjsip_endpt_add_capability( pjsua.endpt, &mod_pjsua_im, PJSIP_H_ALLOW,
+    pjsip_endpt_add_capability( pjsua_var.endpt, &mod_pjsua_im, PJSIP_H_ALLOW,
                                 NULL, 1, &msg_tag);
 

pjproject/trunk/pjsip/src/pjsua-lib/pjsua_pres.c

@@ -18 +18 @@
  */
 #include <pjsua-lib/pjsua.h>
-#include "pjsua_imp.h"
-
-/*
- * pjsua_pres.c
- *
- * Presence related stuffs.
- */
+#include <pjsua-lib/pjsua_internal.h>
+
 
 #define THIS_FILE   "pjsua_pres.c"
 
 
-
-/* **************************************************************************
- * THE FOLLOWING PART HANDLES SERVER SUBSCRIPTION
- * **************************************************************************
+/*
+ * Get total number of buddies.
+ */
+PJ_DEF(unsigned) pjsua_get_buddy_count(void)
+{
+    return pjsua_var.buddy_cnt;
+}
+
+
+/*
+ * Check if buddy ID is valid.
+ */
+PJ_DEF(pj_bool_t) pjsua_buddy_is_valid(pjsua_buddy_id buddy_id)
+{
+    return buddy_id>=0 && buddy_id<PJ_ARRAY_SIZE(pjsua_var.buddy) &&
+           pjsua_var.buddy[buddy_id].uri.slen != 0;
+}
+
+
+/*
+ * Enum buddy IDs.
+ */
+PJ_DEF(pj_status_t) pjsua_enum_buddies( pjsua_buddy_id ids[],
+                                        unsigned *count)
+{
+    unsigned i, c;
+
+    PJ_ASSERT_RETURN(ids && count, PJ_EINVAL);
+
+    PJSUA_LOCK();
+
+    for (i=0, c=0; c<*count && i<PJ_ARRAY_SIZE(pjsua_var.buddy); ++i) {
+        if (!pjsua_var.buddy[i].uri.slen)
+            continue;
+        ids[c] = i;
+        ++c;
+    }
+
+    *count = c;
+
+    PJSUA_UNLOCK();
+
+    return PJ_SUCCESS;
+
+}
+
+
+/*
+ * Get detailed buddy info.
+ */
+PJ_DEF(pj_status_t) pjsua_buddy_get_info( pjsua_buddy_id buddy_id,
+                                          pjsua_buddy_info *info)
+{
+    int total=0;
+    pjsua_buddy *buddy;
+
+    PJ_ASSERT_RETURN(buddy_id>=0 && 
+                       buddy_id<(int)PJ_ARRAY_SIZE(pjsua_var.buddy), 
+                     PJ_EINVAL);
+
+    PJSUA_LOCK();
+
+    pj_memset(info, 0, sizeof(pjsua_buddy_info));
+
+    buddy = &pjsua_var.buddy[buddy_id];
+    info->id = buddy->index;
+    if (pjsua_var.buddy[buddy_id].uri.slen == 0) {
+        PJSUA_UNLOCK();
+        return PJ_SUCCESS;
+    }
+
+    /* uri */
+    info->uri.ptr = info->buf_ + total;
+    pj_strncpy(&info->uri, &buddy->uri, sizeof(info->buf_)-total);
+    total += info->uri.slen;
+
+    /* contact */
+    info->contact.ptr = info->buf_ + total;
+    pj_strncpy(&info->contact, &buddy->contact, sizeof(info->buf_)-total);
+    total += info->contact.slen;
+        
+    /* status and status text */    
+    if (buddy->sub == NULL || buddy->status.info_cnt==0) {
+        info->status = PJSUA_BUDDY_STATUS_UNKNOWN;
+        info->status_text = pj_str("?");
+    } else if (pjsua_var.buddy[buddy_id].status.info[0].basic_open) {
+        info->status = PJSUA_BUDDY_STATUS_ONLINE;
+        info->status_text = pj_str("Online");
+    } else {
+        info->status = PJSUA_BUDDY_STATUS_OFFLINE;
+        info->status_text = pj_str("Offline");
+    }
+
+    /* monitor pres */
+    info->monitor_pres = buddy->monitor;
+
+    PJSUA_UNLOCK();
+    return PJ_SUCCESS;
+}
+
+
+/*
+ * Reset buddy descriptor.
+ */
+static void reset_buddy(pjsua_buddy_id id)
+{
+    pj_memset(&pjsua_var.buddy[id], 0, sizeof(pjsua_var.buddy[id]));
+    pjsua_var.buddy[id].index = id;
+}
+
+
+/*
+ * Add new buddy.
+ */
+PJ_DEF(pj_status_t) pjsua_buddy_add( const pjsua_buddy_config *cfg,
+                                     pjsua_buddy_id *p_buddy_id)
+{
+    pjsip_name_addr *url;
+    pjsip_sip_uri *sip_uri;
+    int index;
+    pj_str_t tmp;
+
+    PJ_ASSERT_RETURN(pjsua_var.buddy_cnt <= 
+                        PJ_ARRAY_SIZE(pjsua_var.buddy),
+                     PJ_ETOOMANY);
+
+    PJSUA_LOCK();
+
+    /* Find empty slot */
+    for (index=0; index<PJ_ARRAY_SIZE(pjsua_var.buddy); ++index) {
+        if (pjsua_var.buddy[index].uri.slen == 0)
+            break;
+    }
+
+    /* Expect to find an empty slot */
+    if (index == PJ_ARRAY_SIZE(pjsua_var.buddy)) {
+        PJSUA_UNLOCK();
+        /* This shouldn't happen */
+        pj_assert(!"index < PJ_ARRAY_SIZE(pjsua_var.buddy)");
+        return PJ_ETOOMANY;
+    }
+
+
+    /* Get name and display name for buddy */
+    pj_strdup_with_null(pjsua_var.pool, &tmp, &cfg->uri);
+    url = (pjsip_name_addr*)pjsip_parse_uri(pjsua_var.pool, tmp.ptr, tmp.slen,
+                                            PJSIP_PARSE_URI_AS_NAMEADDR);
+
+    if (url == NULL) {
+        pjsua_perror(THIS_FILE, "Unable to add buddy", PJSIP_EINVALIDURI);
+        PJSUA_UNLOCK();
+        return PJSIP_EINVALIDURI;
+    }
+
+    /* Reset buddy, to make sure everything is cleared with default
+     * values
+     */
+    reset_buddy(index);
+
+    /* Save URI */
+    pjsua_var.buddy[index].uri = tmp;
+
+    sip_uri = (pjsip_sip_uri*) url->uri;
+    pjsua_var.buddy[index].name = sip_uri->user;
+    pjsua_var.buddy[index].display = url->display;
+    pjsua_var.buddy[index].host = sip_uri->host;
+    pjsua_var.buddy[index].port = sip_uri->port;
+    pjsua_var.buddy[index].monitor = cfg->subscribe;
+    if (pjsua_var.buddy[index].port == 0)
+        pjsua_var.buddy[index].port = 5060;
+
+    if (p_buddy_id)
+        *p_buddy_id = index;
+
+    pjsua_var.buddy_cnt++;
+
+    pjsua_buddy_subscribe_pres(index, cfg->subscribe);
+
+    PJSUA_UNLOCK();
+
+    return PJ_SUCCESS;
+}
+
+
+/*
+ * Delete buddy.
+ */
+PJ_DEF(pj_status_t) pjsua_buddy_del(pjsua_buddy_id buddy_id)
+{
+    PJ_ASSERT_RETURN(buddy_id>=0 && 
+                        buddy_id<(int)PJ_ARRAY_SIZE(pjsua_var.buddy),
+                     PJ_EINVAL);
+
+    PJSUA_LOCK();
+
+    if (pjsua_var.buddy[buddy_id].uri.slen == 0) {
+        PJSUA_UNLOCK();
+        return PJ_SUCCESS;
+    }
+
+    /* Unsubscribe presence */
+    pjsua_buddy_subscribe_pres(buddy_id, PJ_FALSE);
+
+    /* Remove buddy */
+    pjsua_var.buddy[buddy_id].uri.slen = 0;
+    pjsua_var.buddy_cnt--;
+
+    /* Reset buddy struct */
+    reset_buddy(buddy_id);
+
+    PJSUA_UNLOCK();
+    return PJ_SUCCESS;
+}
+
+
+/*
+ * Enable/disable buddy's presence monitoring.
+ */
+PJ_DEF(pj_status_t) pjsua_buddy_subscribe_pres( pjsua_buddy_id buddy_id,
+                                                pj_bool_t subscribe)
+{
+    pjsua_buddy *buddy;
+
+    PJ_ASSERT_RETURN(buddy_id>=0 && 
+                        buddy_id<(int)PJ_ARRAY_SIZE(pjsua_var.buddy),
+                     PJ_EINVAL);
+
+    PJSUA_LOCK();
+
+    buddy = &pjsua_var.buddy[buddy_id];
+    buddy->monitor = subscribe;
+    pjsua_pres_refresh();
+
+    PJSUA_UNLOCK();
+
+    return PJ_SUCCESS;
+}
+
+
+/*
+ * Dump presence subscriptions to log file.
+ */
+PJ_DEF(void) pjsua_pres_dump(pj_bool_t verbose)
+{
+    unsigned acc_id;
+    unsigned i;
+
+    
+    PJSUA_LOCK();
+
+    /*
+     * When no detail is required, just dump number of server and client
+     * subscriptions.
+     */
+    if (verbose == PJ_FALSE) {
+        
+        int count = 0;
+
+        for (acc_id=0; acc_id<PJ_ARRAY_SIZE(pjsua_var.acc); ++acc_id) {
+
+            if (!pjsua_var.acc[acc_id].valid)
+                continue;
+
+            if (!pj_list_empty(&pjsua_var.acc[acc_id].pres_srv_list)) {
+                struct pjsua_srv_pres *uapres;
+
+                uapres = pjsua_var.acc[acc_id].pres_srv_list.next;
+                while (uapres != &pjsua_var.acc[acc_id].pres_srv_list) {
+                    ++count;
+                    uapres = uapres->next;
+                }
+            }
+        }
+
+        PJ_LOG(3,(THIS_FILE, "Number of server/UAS subscriptions: %d", 
+                  count));
+
+        count = 0;
+
+        for (i=0; i<PJ_ARRAY_SIZE(pjsua_var.buddy); ++i) {
+            if (pjsua_var.buddy[i].uri.slen == 0)
+                continue;
+            if (pjsua_var.buddy[i].sub) {
+                ++count;
+            }
+        }
+
+        PJ_LOG(3,(THIS_FILE, "Number of client/UAC subscriptions: %d", 
+                  count));
+        PJSUA_UNLOCK();
+        return;
+    }
+    
+
+    /*
+     * Dumping all server (UAS) subscriptions
+     */
+    PJ_LOG(3,(THIS_FILE, "Dumping pjsua server subscriptions:"));
+
+    for (acc_id=0; acc_id<(int)PJ_ARRAY_SIZE(pjsua_var.acc); ++acc_id) {
+
+        if (!pjsua_var.acc[acc_id].valid)
+            continue;
+
+        PJ_LOG(3,(THIS_FILE, "  %.*s",
+                  (int)pjsua_var.acc[acc_id].cfg.id.slen,
+                  pjsua_var.acc[acc_id].cfg.id.ptr));
+
+        if (pj_list_empty(&pjsua_var.acc[acc_id].pres_srv_list)) {
+
+            PJ_LOG(3,(THIS_FILE, "  - none - "));
+
+        } else {
+            struct pjsua_srv_pres *uapres;
+
+            uapres = pjsua_var.acc[acc_id].pres_srv_list.next;
+            while (uapres != &pjsua_var.acc[acc_id].pres_srv_list) {
+            
+                PJ_LOG(3,(THIS_FILE, "    %10s %s",
+                          pjsip_evsub_get_state_name(uapres->sub),
+                          uapres->remote));
+
+                uapres = uapres->next;
+            }
+        }
+    }
+
+    /*
+     * Dumping all client (UAC) subscriptions
+     */
+    PJ_LOG(3,(THIS_FILE, "Dumping pjsua client subscriptions:"));
+
+    if (pjsua_var.buddy_cnt == 0) {
+
+        PJ_LOG(3,(THIS_FILE, "  - no buddy list - "));
+
+    } else {
+        for (i=0; i<PJ_ARRAY_SIZE(pjsua_var.buddy); ++i) {
+
+            if (pjsua_var.buddy[i].uri.slen == 0)
+                continue;
+
+            if (pjsua_var.buddy[i].sub) {
+                PJ_LOG(3,(THIS_FILE, "  %10s %.*s",
+                          pjsip_evsub_get_state_name(pjsua_var.buddy[i].sub),
+                          (int)pjsua_var.buddy[i].uri.slen,
+                          pjsua_var.buddy[i].uri.ptr));
+            } else {
+                PJ_LOG(3,(THIS_FILE, "  %10s %.*s",
+                          "(null)",
+                          (int)pjsua_var.buddy[i].uri.slen,
+                          pjsua_var.buddy[i].uri.ptr));
+            }
+        }
+    }
+
+    PJSUA_UNLOCK();
+}
+
+
+/***************************************************************************
+ * Server subscription.
  */
 
@@ -61 +414 @@
 static void pres_evsub_on_srv_state( pjsip_evsub *sub, pjsip_event *event)
 {
-    pjsua_srv_pres *uapres = pjsip_evsub_get_mod_data(sub, pjsua.mod.id);
+    pjsua_srv_pres *uapres;
 
     PJ_UNUSED_ARG(event);
 
+    PJSUA_LOCK();
+
+    uapres = pjsip_evsub_get_mod_data(sub, pjsua_var.mod.id);
     if (uapres) {
         PJ_LOG(3,(THIS_FILE, "Server subscription to %s is %s",
@@ -70 +426 @@
 
         if (pjsip_evsub_get_state(sub) == PJSIP_EVSUB_STATE_TERMINATED) {
-            pjsip_evsub_set_mod_data(sub, pjsua.mod.id, NULL);
+            pjsip_evsub_set_mod_data(sub, pjsua_var.mod.id, NULL);
             pj_list_erase(uapres);
         }
     }
+
+    PJSUA_UNLOCK();
 }
 
@@ -81 +439 @@
 static pj_bool_t pres_on_rx_request(pjsip_rx_data *rdata)
 {
-    int acc_index;
+    int acc_id;
     pjsua_acc_config *acc_config;
     pjsip_method *req_method = &rdata->msg_info.msg->line.req.method;
@@ -97 +455 @@
     /* Incoming SUBSCRIBE: */
 
+    PJSUA_LOCK();
+
     /* Find which account for the incoming request. */
-    acc_index = pjsua_acc_find_for_incoming(rdata);
-    acc_config = &pjsua.config.acc_config[acc_index];
+    acc_id = pjsua_acc_find_for_incoming(rdata);
+    acc_config = &pjsua_var.acc[acc_id].cfg;
 
     /* Create UAS dialog: */
@@ -109 +469 @@
                      "Unable to create UAS dialog for subscription", 
                      status);
-        return PJ_FALSE;
+        PJSUA_UNLOCK();
+        return PJ_TRUE;
     }
 
@@ -122 +483 @@
         pjsua_perror(THIS_FILE, "Unable to create server subscription", 
                      status);
-        return PJ_FALSE;
+        PJSUA_UNLOCK();
+        return PJ_TRUE;
     }
 
@@ -136 +498 @@
         uapres->remote[status] = '\0';
 
-    pjsip_evsub_set_mod_data(sub, pjsua.mod.id, uapres);
+    pjsip_evsub_set_mod_data(sub, pjsua_var.mod.id, uapres);
 
     /* Add server subscription to the list: */
-    pj_list_push_back(&pjsua.acc[acc_index].pres_srv_list, uapres);
+    pj_list_push_back(&pjsua_var.acc[acc_id].pres_srv_list, uapres);
 
 
@@ -149 +511 @@
         pj_list_erase(uapres);
         pjsip_pres_terminate(sub, PJ_FALSE);
+        PJSUA_UNLOCK();
         return PJ_FALSE;
     }
@@ -156 +519 @@
     pj_memset(&pres_status, 0, sizeof(pres_status));
     pres_status.info_cnt = 1;
-    pres_status.info[0].basic_open = pjsua.acc[acc_index].online_status;
-    //Both pjsua.local_uri and pjsua.contact_uri are enclosed in "<" and ">"
+    pres_status.info[0].basic_open = pjsua_var.acc[acc_id].online_status;
+    //Both pjsua_var.local_uri and pjsua_var.contact_uri are enclosed in "<" and ">"
     //causing XML parsing to fail.
-    //pres_status.info[0].contact = pjsua.local_uri;
+    //pres_status.info[0].contact = pjsua_var.local_uri;
 
     pjsip_pres_set_status(sub, &pres_status);
@@ -174 +537 @@
         pj_list_erase(uapres);
         pjsip_pres_terminate(sub, PJ_FALSE);
+        PJSUA_UNLOCK();
         return PJ_FALSE;
     }
@@ -180 +544 @@
     /* Done: */
 
+    PJSUA_UNLOCK();
+
     return PJ_TRUE;
 }
 
 
+/* Terminate server subscription for the account */
+void pjsua_pres_delete_acc(int acc_id)
+{
+    pjsua_srv_pres *uapres;
+
+    uapres = pjsua_var.acc[acc_id].pres_srv_list.next;
+
+    while (uapres != &pjsua_var.acc[acc_id].pres_srv_list) {
+        
+        pjsip_pres_status pres_status;
+        pj_str_t reason = { "noresource", 10 };
+        pjsip_tx_data *tdata;
+
+        pjsip_pres_get_status(uapres->sub, &pres_status);
+        
+        pres_status.info[0].basic_open = pjsua_var.acc[acc_id].online_status;
+        pjsip_pres_set_status(uapres->sub, &pres_status);
+
+        if (pjsip_pres_notify(uapres->sub, 
+                              PJSIP_EVSUB_STATE_TERMINATED, NULL,
+                              &reason, &tdata)==PJ_SUCCESS)
+        {
+            pjsip_pres_send_request(uapres->sub, tdata);
+        }
+
+        uapres = uapres->next;
+    }
+}
+
+
 /* Refresh subscription (e.g. when our online status has changed) */
-static void refresh_server_subscription(int acc_index)
+static void refresh_server_subscription(int acc_id)
 {
     pjsua_srv_pres *uapres;
 
-    uapres = pjsua.acc[acc_index].pres_srv_list.next;
-
-    while (uapres != &pjsua.acc[acc_index].pres_srv_list) {
+    uapres = pjsua_var.acc[acc_id].pres_srv_list.next;
+
+    while (uapres != &pjsua_var.acc[acc_id].pres_srv_list) {
         
         pjsip_pres_status pres_status;
@@ -197 +593 @@
 
         pjsip_pres_get_status(uapres->sub, &pres_status);
-        if (pres_status.info[0].basic_open != pjsua.acc[acc_index].online_status) {
-            pres_status.info[0].basic_open = pjsua.acc[acc_index].online_status;
+        if (pres_status.info[0].basic_open != pjsua_var.acc[acc_id].online_status) {
+            pres_status.info[0].basic_open = pjsua_var.acc[acc_id].online_status;
             pjsip_pres_set_status(uapres->sub, &pres_status);
 
-            if (pjsua.quit_flag) {
-                pj_str_t reason = { "noresource", 10 };
-                if (pjsip_pres_notify(uapres->sub, 
-                                      PJSIP_EVSUB_STATE_TERMINATED, NULL,
-                                      &reason, &tdata)==PJ_SUCCESS)
-                {
-                    pjsip_pres_send_request(uapres->sub, tdata);
-                }
-            } else {
-                if (pjsip_pres_current_notify(uapres->sub, &tdata)==PJ_SUCCESS)
-                    pjsip_pres_send_request(uapres->sub, tdata);
-            }
+            if (pjsip_pres_current_notify(uapres->sub, &tdata)==PJ_SUCCESS)
+                pjsip_pres_send_request(uapres->sub, tdata);
         }
 
@@ -221 +607 @@
 
 
-/* **************************************************************************
- * THE FOLLOWING PART HANDLES CLIENT SUBSCRIPTION
- * **************************************************************************
+/***************************************************************************
+ * Client subscription.
  */
 
@@ -233 +618 @@
     PJ_UNUSED_ARG(event);
 
-    buddy = pjsip_evsub_get_mod_data(sub, pjsua.mod.id);
+    PJSUA_LOCK();
+
+    buddy = pjsip_evsub_get_mod_data(sub, pjsua_var.mod.id);
     if (buddy) {
         PJ_LOG(3,(THIS_FILE, 
                   "Presence subscription to %.*s is %s",
-                  (int)pjsua.config.buddy_uri[buddy->index].slen,
-                  pjsua.config.buddy_uri[buddy->index].ptr, 
+                  (int)pjsua_var.buddy[buddy->index].uri.slen,
+                  pjsua_var.buddy[buddy->index].uri.ptr, 
                   pjsip_evsub_get_state_name(sub)));
 
@@ -244 +631 @@
             buddy->sub = NULL;
             buddy->status.info_cnt = 0;
-            pjsip_evsub_set_mod_data(sub, pjsua.mod.id, NULL);
+            pjsip_evsub_set_mod_data(sub, pjsua_var.mod.id, NULL);
         }
 
         /* Call callback */
-        if (pjsua.cb.on_buddy_state)
-            (*pjsua.cb.on_buddy_state)(buddy->index);
-    }
-}
+        if (pjsua_var.ua_cfg.cb.on_buddy_state)
+            (*pjsua_var.ua_cfg.cb.on_buddy_state)(buddy->index);
+    }
+
+    PJSUA_UNLOCK();
+}
+
+
+/* Callback when transaction state has changed. */
+static void pjsua_evsub_on_tsx_state(pjsip_evsub *sub, 
+                                     pjsip_transaction *tsx,
+                                     pjsip_event *event)
+{
+    pjsua_buddy *buddy;
+    pjsip_contact_hdr *contact_hdr;
+
+    PJSUA_LOCK();
+
+    buddy = pjsip_evsub_get_mod_data(sub, pjsua_var.mod.id);
+    if (!buddy) {
+        PJSUA_UNLOCK();
+        return;
+    }
+
+    /* We only use this to update buddy's Contact, when it's not
+     * set.
+     */
+    if (buddy->contact.slen != 0) {
+        /* Contact already set */
+        PJSUA_UNLOCK();
+        return;
+    }
+    
+    /* Only care about 2xx response to outgoing SUBSCRIBE */
+    if (tsx->status_code/100 != 2 ||
+        tsx->role != PJSIP_UAC_ROLE ||
+        event->type != PJSIP_EVENT_RX_MSG || 
+        pjsip_method_cmp(&tsx->method, &pjsip_subscribe_method)!=0)
+    {
+        PJSUA_UNLOCK();
+        return;
+    }
+
+    /* Find contact header. */
+    contact_hdr = pjsip_msg_find_hdr(event->body.rx_msg.rdata->msg_info.msg,
+                                     PJSIP_H_CONTACT, NULL);
+    if (!contact_hdr) {
+        PJSUA_UNLOCK();
+        return;
+    }
+
+    buddy->contact.ptr = pj_pool_alloc(pjsua_var.pool, PJSIP_MAX_URL_SIZE);
+    buddy->contact.slen = pjsip_uri_print( PJSIP_URI_IN_CONTACT_HDR,
+                                           contact_hdr->uri,
+                                           buddy->contact.ptr, 
+                                           PJSIP_MAX_URL_SIZE);
+    if (buddy->contact.slen < 0)
+        buddy->contact.slen = 0;
+
+    PJSUA_UNLOCK();
+}
+
 
 /* Callback called when we receive NOTIFY */
@@ -263 +708 @@
     pjsua_buddy *buddy;
 
-    buddy = pjsip_evsub_get_mod_data(sub, pjsua.mod.id);
+    PJSUA_LOCK();
+
+    buddy = pjsip_evsub_get_mod_data(sub, pjsua_var.mod.id);
     if (buddy) {
         /* Update our info. */
@@ -277 +724 @@
     PJ_UNUSED_ARG(res_hdr);
     PJ_UNUSED_ARG(p_body);
+
+    PJSUA_UNLOCK();
 }
 
@@ -284 +733 @@
 {
     &pjsua_evsub_on_state,  
-
-    NULL,   /* on_tsx_state: don't care about transaction state. */
+    &pjsua_evsub_on_tsx_state,
 
     NULL,   /* on_rx_refresh: don't care about SUBSCRIBE refresh, unless 
@@ -305 +753 @@
 static void subscribe_buddy_presence(unsigned index)
 {
-    int acc_index;
-    pjsua_acc_config *acc_config;
+    pjsua_buddy *buddy;
+    int acc_id;
+    pjsua_acc *acc;
     pjsip_dialog *dlg;
     pjsip_tx_data *tdata;
     pj_status_t status;
 
-    acc_index = pjsua_acc_find_for_outgoing(&pjsua.config.buddy_uri[index]);
-
-    acc_config = &pjsua.config.acc_config[acc_index];
-
+    buddy = &pjsua_var.buddy[index];
+    acc_id = pjsua_acc_find_for_outgoing(&buddy->uri);
+
+    acc = &pjsua_var.acc[acc_id];
+
+    /* Create UAC dialog */
     status = pjsip_dlg_create_uac( pjsip_ua_instance(), 
-                                   &acc_config->id,
-                                   &acc_config->contact,
-                                   &pjsua.config.buddy_uri[index],
+                                   &acc->cfg.id,
+                                   &acc->cfg.contact,
+                                   &buddy->uri,
                                    NULL, &dlg);
     if (status != PJ_SUCCESS) {
@@ -326 +777 @@
     }
 
-    if (acc_config->cred_count) {
+    /* Set route-set */
+    if (!pj_list_empty(&acc->route_set)) {
+        pjsip_dlg_set_route_set(dlg, &acc->route_set);
+    }
+
+    /* Set credentials */
+    if (acc->cred_cnt) {
         pjsip_auth_clt_set_credentials( &dlg->auth_sess, 
-                                        acc_config->cred_count,
-                                        acc_config->cred_info);
+                                        acc->cred_cnt, acc->cred);
     }
 
     status = pjsip_pres_create_uac( dlg, &pres_callback, 
-                                    &pjsua.buddies[index].sub);
+                                    &buddy->sub);
     if (status != PJ_SUCCESS) {
-        pjsua.buddies[index].sub = NULL;
+        pjsua_var.buddy[index].sub = NULL;
         pjsua_perror(THIS_FILE, "Unable to create presence client", 
                      status);
@@ -342 +798 @@
     }
 
-    pjsip_evsub_set_mod_data(pjsua.buddies[index].sub, pjsua.mod.id,
-                             &pjsua.buddies[index]);
-
-    status = pjsip_pres_initiate(pjsua.buddies[index].sub, -1, &tdata);
+    pjsip_evsub_set_mod_data(buddy->sub, pjsua_var.mod.id, buddy);
+
+    status = pjsip_pres_initiate(buddy->sub, -1, &tdata);
     if (status != PJ_SUCCESS) {
-        pjsip_pres_terminate(pjsua.buddies[index].sub, PJ_FALSE);
-        pjsua.buddies[index].sub = NULL;
+        pjsip_pres_terminate(buddy->sub, PJ_FALSE);
+        buddy->sub = NULL;
         pjsua_perror(THIS_FILE, "Unable to create initial SUBSCRIBE", 
                      status);
@@ -354 +809 @@
     }
 
-    status = pjsip_pres_send_request(pjsua.buddies[index].sub, tdata);
+    status = pjsip_pres_send_request(buddy->sub, tdata);
     if (status != PJ_SUCCESS) {
-        pjsip_pres_terminate(pjsua.buddies[index].sub, PJ_FALSE);
-        pjsua.buddies[index].sub = NULL;
+        pjsip_pres_terminate(buddy->sub, PJ_FALSE);
+        buddy->sub = NULL;
         pjsua_perror(THIS_FILE, "Unable to send initial SUBSCRIBE", 
                      status);
@@ -368 +823 @@
 static void unsubscribe_buddy_presence(unsigned index)
 {
+    pjsua_buddy *buddy;
     pjsip_tx_data *tdata;
     pj_status_t status;
 
-    if (pjsua.buddies[index].sub == NULL)
-        return;
-
-    if (pjsip_evsub_get_state(pjsua.buddies[index].sub) == 
-        PJSIP_EVSUB_STATE_TERMINATED)
-    {
-        pjsua.buddies[index].sub = NULL;
-        return;
-    }
-
-    status = pjsip_pres_initiate( pjsua.buddies[index].sub, 0, &tdata);
+    buddy = &pjsua_var.buddy[index];
+
+    if (buddy->sub == NULL)
+        return;
+
+    if (pjsip_evsub_get_state(buddy->sub) == PJSIP_EVSUB_STATE_TERMINATED) {
+        pjsua_var.buddy[index].sub = NULL;
+        return;
+    }
+
+    status = pjsip_pres_initiate( buddy->sub, 0, &tdata);
     if (status == PJ_SUCCESS)
-        status = pjsip_pres_send_request( pjsua.buddies[index].sub, tdata );
+        status = pjsip_pres_send_request( buddy->sub, tdata );
 
     if (status != PJ_SUCCESS) {
-
-        pjsip_pres_terminate(pjsua.buddies[index].sub, PJ_FALSE);
-        pjsua.buddies[index].sub = NULL;
+        pjsip_pres_terminate(buddy->sub, PJ_FALSE);
+        buddy->sub = NULL;
         pjsua_perror(THIS_FILE, "Unable to unsubscribe presence", 
                      status);
@@ -396 +851 @@
 
 /* It does what it says.. */
-static void refresh_client_subscription(void)
+static void refresh_client_subscriptions(void)
 {
     unsigned i;
 
-    for (i=0; i<pjsua.config.buddy_cnt; ++i) {
-
-        if (pjsua.buddies[i].monitor && !pjsua.buddies[i].sub) {
+    for (i=0; i<PJ_ARRAY_SIZE(pjsua_var.buddy); ++i) {
+
+        if (!pjsua_var.buddy[i].uri.slen)
+            continue;
+
+        if (pjsua_var.buddy[i].monitor && !pjsua_var.buddy[i].sub) {
             subscribe_buddy_presence(i);
 
-        } else if (!pjsua.buddies[i].monitor && pjsua.buddies[i].sub) {
+        } else if (!pjsua_var.buddy[i].monitor && pjsua_var.buddy[i].sub) {
             unsubscribe_buddy_presence(i);
 
@@ -418 +876 @@
 pj_status_t pjsua_pres_init()
 {
+    unsigned i;
     pj_status_t status;
 
-    status = pjsip_endpt_register_module( pjsua.endpt, &mod_pjsua_pres);
+    status = pjsip_endpt_register_module( pjsua_var.endpt, &mod_pjsua_pres);
     if (status != PJ_SUCCESS) {
         pjsua_perror(THIS_FILE, "Unable to register pjsua presence module", 
@@ -426 +885 @@
     }
 
+    for (i=0; i<PJ_ARRAY_SIZE(pjsua_var.buddy); ++i) {
+        reset_buddy(i);
+    }
+
     return status;
 }
 
-/*
- * Get buddy count.
- */
-PJ_DEF(unsigned) pjsua_get_buddy_count(void)
-{
-    return pjsua.config.buddy_cnt;
-}
-
-
-/**
- * Get buddy info.
- */
-PJ_DEF(pj_status_t) pjsua_buddy_get_info(pjsua_buddy_id index,
-                                         pjsua_buddy_info *info)
-{
-    pjsua_buddy *buddy;
-
-    PJ_ASSERT_RETURN(index < (int)PJ_ARRAY_SIZE(pjsua.config.buddy_uri), 
-                     PJ_EINVAL);
-
-    pj_memset(info, 0, sizeof(pjsua_buddy_info));
-
-    buddy = &pjsua.buddies[index];
-    info->index = buddy->index;
-    info->is_valid = pjsua.config.buddy_uri[index].slen;
-    if (!info->is_valid)
-        return PJ_SUCCESS;
-
-    info->name = buddy->name;
-    info->display_name = buddy->display;
-    info->host = buddy->host;
-    info->port = buddy->port;
-    info->uri = pjsua.config.buddy_uri[index];
-    
-    if (buddy->sub == NULL || buddy->status.info_cnt==0) {
-        info->status = PJSUA_BUDDY_STATUS_UNKNOWN;
-        info->status_text = pj_str("?");
-    } else if (pjsua.buddies[index].status.info[0].basic_open) {
-        info->status = PJSUA_BUDDY_STATUS_ONLINE;
-        info->status_text = pj_str("Online");
-    } else {
-        info->status = PJSUA_BUDDY_STATUS_OFFLINE;
-        info->status_text = pj_str("Offline");
-    }
-
+
+/*
+ * Start presence subsystem.
+ */
+pj_status_t pjsua_pres_start(void)
+{
+    /* Nothing to do (is it?) */
     return PJ_SUCCESS;
 }
 
 
-/**
- * Add new buddy.
- */
-PJ_DEF(pj_status_t) pjsua_buddy_add( const pj_str_t *uri,
-                                     pjsua_buddy_id *buddy_index)
-{
-    pjsip_name_addr *url;
-    pjsip_sip_uri *sip_uri;
-    int index;
-    pj_str_t tmp;
-
-    PJ_ASSERT_RETURN(pjsua.config.buddy_cnt <= 
-                        PJ_ARRAY_SIZE(pjsua.config.buddy_uri),
-                     PJ_ETOOMANY);
-
-    /* Find empty slot */
-    for (index=0; index<PJ_ARRAY_SIZE(pjsua.config.buddy_uri); ++index) {
-        if (pjsua.config.buddy_uri[index].slen == 0)
-            break;
-    }
-
-    /* Expect to find an empty slot */
-    PJ_ASSERT_RETURN(index < PJ_ARRAY_SIZE(pjsua.config.buddy_uri),
-                     PJ_ETOOMANY);
-
-
-    /* Get name and display name for buddy */
-    pj_strdup_with_null(pjsua.pool, &tmp, uri);
-    url = (pjsip_name_addr*)pjsip_parse_uri(pjsua.pool, tmp.ptr, tmp.slen,
-                                            PJSIP_PARSE_URI_AS_NAMEADDR);
-
-    if (url == NULL)
-        return PJSIP_EINVALIDURI;
-
-    /* Save URI */
-    pjsua.config.buddy_uri[index] = tmp;
-
-    sip_uri = (pjsip_sip_uri*) url->uri;
-    pjsua.buddies[index].name = sip_uri->user;
-    pjsua.buddies[index].display = url->display;
-    pjsua.buddies[index].host = sip_uri->host;
-    pjsua.buddies[index].port = sip_uri->port;
-    if (pjsua.buddies[index].port == 0)
-        pjsua.buddies[index].port = 5060;
-
-    if (buddy_index)
-        *buddy_index = index;
-
-    pjsua.config.buddy_cnt++;
-
-    return PJ_SUCCESS;
-}
-
-
-
-/**
- * Delete buddy.
- */
-PJ_DEF(pj_status_t) pjsua_buddy_del(pjsua_buddy_id index)
-{
-    PJ_ASSERT_RETURN(index < (int)PJ_ARRAY_SIZE(pjsua.config.buddy_uri), 
-                     PJ_EINVAL);
-
-    if (pjsua.config.buddy_uri[index].slen == 0)
-        return PJ_SUCCESS;
-
-    /* Unsubscribe presence */
-    pjsua_buddy_subscribe_pres(index, PJ_FALSE);
-
-    /* Remove buddy */
-    pjsua.config.buddy_uri[index].slen = 0;
-    pjsua.config.buddy_cnt--;
-
-    return PJ_SUCCESS;
-}
-
-
-PJ_DEF(pj_status_t) pjsua_buddy_subscribe_pres( pjsua_buddy_id index,
-                                                pj_bool_t monitor)
-{
-    pjsua_buddy *buddy;
-
-    PJ_ASSERT_RETURN(index < (int)PJ_ARRAY_SIZE(pjsua.config.buddy_uri),
-                     PJ_EINVAL);
-
-    buddy = &pjsua.buddies[index];
-    buddy->monitor = monitor;
+/*
+ * Refresh presence subscriptions
+ */
+void pjsua_pres_refresh()
+{
+    unsigned i;
+
+    refresh_client_subscriptions();
+
+    for (i=0; i<PJ_ARRAY_SIZE(pjsua_var.acc); ++i) {
+        if (pjsua_var.acc[i].valid)
+            refresh_server_subscription(i);
+    }
+}
+
+
+/*
+ * Shutdown presence.
+ */
+void pjsua_pres_shutdown(void)
+{
+    unsigned i;
+
+    for (i=0; i<PJ_ARRAY_SIZE(pjsua_var.acc); ++i) {
+        if (!pjsua_var.acc[i].valid)
+            continue;
+        pjsua_pres_delete_acc(i);
+    }
+
+    for (i=0; i<PJ_ARRAY_SIZE(pjsua_var.buddy); ++i) {
+        pjsua_var.buddy[i].monitor = 0;
+    }
+
     pjsua_pres_refresh();
-    return PJ_SUCCESS;
-}
-
-
-PJ_DEF(pj_status_t) pjsua_acc_set_online_status( pjsua_acc_id acc_index,
-                                                 pj_bool_t is_online)
-{
-    PJ_ASSERT_RETURN(acc_index < (int)PJ_ARRAY_SIZE(pjsua.acc), 
-                     PJ_EINVAL);
-    PJ_ASSERT_RETURN(pjsua.acc[acc_index].valid, PJ_EINVALIDOP);
-
-    pjsua.acc[acc_index].online_status = is_online;
-    pjsua_pres_refresh();
-    return PJ_SUCCESS;
-}
-
-
-/*
- * Refresh presence
- */
-PJ_DEF(void) pjsua_pres_refresh()
-{
-    unsigned i;
-
-    refresh_client_subscription();
-
-    for (i=0; i<PJ_ARRAY_SIZE(pjsua.acc); ++i)
-        refresh_server_subscription(i);
-}
-
-
-/*
- * Shutdown presence.
- */
-void pjsua_pres_shutdown(void)
-{
-    unsigned acc_index;
-    unsigned i;
-
-    for (acc_index=0; acc_index<(int)pjsua.config.acc_cnt; ++acc_index) {
-        pjsua.acc[acc_index].online_status = 0;
-    }
-
-    for (i=0; i<pjsua.config.buddy_cnt; ++i) {
-        pjsua.buddies[i].monitor = 0;
-    }
-
-    pjsua_pres_refresh();
-}
-
-/*
- * Dump presence status.
- */
-void pjsua_pres_dump(pj_bool_t detail)
-{
-    unsigned acc_index;
-    unsigned i;
-
-
-    /*
-     * When no detail is required, just dump number of server and client
-     * subscriptions.
-     */
-    if (detail == PJ_FALSE) {
-        
-        int count = 0;
-
-        for (acc_index=0; acc_index < (int)pjsua.config.acc_cnt; ++acc_index) {
-
-            if (!pj_list_empty(&pjsua.acc[acc_index].pres_srv_list)) {
-                struct pjsua_srv_pres *uapres;
-
-                uapres = pjsua.acc[acc_index].pres_srv_list.next;
-                while (uapres != &pjsua.acc[acc_index].pres_srv_list) {
-                    ++count;
-                    uapres = uapres->next;
-                }
-            }
-        }
-
-        PJ_LOG(3,(THIS_FILE, "Number of server/UAS subscriptions: %d", 
-                  count));
-
-        count = 0;
-
-        for (i=0; i<pjsua.config.buddy_cnt; ++i) {
-            if (pjsua.buddies[i].sub) {
-                ++count;
-            }
-        }
-
-        PJ_LOG(3,(THIS_FILE, "Number of client/UAC subscriptions: %d", 
-                  count));
-        return;
-    }
-    
-
-    /*
-     * Dumping all server (UAS) subscriptions
-     */
-    PJ_LOG(3,(THIS_FILE, "Dumping pjsua server subscriptions:"));
-
-    for (acc_index=0; acc_index < (int)pjsua.config.acc_cnt; ++acc_index) {
-
-        PJ_LOG(3,(THIS_FILE, "  %.*s",
-                  (int)pjsua.config.acc_config[acc_index].id.slen,
-                  pjsua.config.acc_config[acc_index].id.ptr));
-
-        if (pj_list_empty(&pjsua.acc[acc_index].pres_srv_list)) {
-
-            PJ_LOG(3,(THIS_FILE, "  - none - "));
-
-        } else {
-            struct pjsua_srv_pres *uapres;
-
-            uapres = pjsua.acc[acc_index].pres_srv_list.next;
-            while (uapres != &pjsua.acc[acc_index].pres_srv_list) {
-            
-                PJ_LOG(3,(THIS_FILE, "    %10s %s",
-                          pjsip_evsub_get_state_name(uapres->sub),
-                          uapres->remote));
-
-                uapres = uapres->next;
-            }
-        }
-    }
-
-    /*
-     * Dumping all client (UAC) subscriptions
-     */
-    PJ_LOG(3,(THIS_FILE, "Dumping pjsua client subscriptions:"));
-
-    if (pjsua.config.buddy_cnt == 0) {
-
-        PJ_LOG(3,(THIS_FILE, "  - no buddy list - "));
-
-    } else {
-        for (i=0; i<pjsua.config.buddy_cnt; ++i) {
-
-            if (pjsua.buddies[i].sub) {
-                PJ_LOG(3,(THIS_FILE, "  %10s %.*s",
-                          pjsip_evsub_get_state_name(pjsua.buddies[i].sub),
-                          (int)pjsua.config.buddy_uri[i].slen,
-                          pjsua.config.buddy_uri[i].ptr));
-            } else {
-                PJ_LOG(3,(THIS_FILE, "  %10s %.*s",
-                          "(null)",
-                          (int)pjsua.config.buddy_uri[i].slen,
-                          pjsua.config.buddy_uri[i].ptr));
-            }
-        }
-    }
-}
-
+}

@@ -8 +8 @@
 *.suo
 *.pdb
+activex-pjsua_p.c
+dlldata.c